What Was the Background to the October 7 Attacks? Reading the Official Chronology, the Party’s Own Statement and the Assessments Issued

About 1,200 people were killed and about 251 taken hostage on 7 October 2023, the US Congressional Research Service records in its 2024 briefing for Congress, which dates the arrangement that preceded the attack to 2007, when Hamas took control of the Gaza Strip and Israel and Egypt imposed closure measures. Those conditions held for the 16 years to the attack, which places the standing grievances a party names in one category and the questions about timing and preparation in another. The published assessments answer the second set differently from the first: the Combating Terrorism Center at West Point’s 2023 assessment describes preparation running over years against an Israeli assessment that Hamas was deterred.

Key Findings

• About 1,200 people were killed and about 251 taken hostage on 7 October 2023, per the US Congressional Research Service’s 2024 briefing; the same official record dates Hamas’s control of Gaza and the Israeli and Egyptian closure measures to 2007.
• Hamas’s own statement of 7 October 2023 named four conditions, the occupation, the blockade, settlement expansion and settler violence, as the Congressional Research Service summarizes it. All four were present across each of the preceding 16 years.
• The Combating Terrorism Center at West Point’s 2023 assessment of the intelligence failings attributes the surprise to the framework warning material was read within, an assessment that Hamas sought to govern Gaza rather than mount a large ground assault.
• The date was Simchat Torah and a Saturday, and fell one day after the 50th anniversary of the 6 October 1973 war, per the Congressional Research Service’s 2023 FAQ for Congress.
• The Community Security Trust recorded 2,699 antisemitic incidents in the United Kingdom between 7 October and 31 December 2023, a 589% rise on the 392 it recorded across the same dates in 2022, on its own definitions and from voluntary reports.

What does the record show preceded the October 7 attack?

About 1,200 people were killed on 7 October 2023, the US Congressional Research Service records in its 2024 briefing for Congress, which dates the preceding arrangement to 2007, when Hamas took control of the Gaza Strip and Israel and Egypt imposed closure measures that held for the 16 years to the attack. The same official record counts about 251 people taken hostage and documents repeated rounds of conflict between Israel and Hamas across those years.

The 1,200 and 251 figures are the ones that circulate most widely, and the Congressional Research Service publishes both with the qualifier “about”. The Anti-Defamation League, a monitoring organization with an advocacy mission, repeats the same two figures in its October 7 backgrounder.

For the single day, the Begin-Sadat Center for Strategic Studies records 1,184 Israelis confirmed killed on 7 October 2023, in a situation report that credits no official body for the count and is therefore the institute’s own compilation. The same report gives 1,664 Israelis killed and 17,809 wounded in the war cumulatively to 5 September 2024.

On the hostages, the Israeli Ministry of Foreign Affairs states in a position paper current to 14 September 2025 that 207 hostages had returned or been recovered, 148 alive and 59 deceased, with 48 remaining in captivity. Those are Israel’s own reported counts as a party to the conflict, not an independently verified tally, and they do not reconcile exactly with the roughly 251 taken, which the Congressional Research Service itself gives as an approximation.

Three elements of the background are therefore fixed in the official record rather than inferred: the year the governing arrangement and the closure measures began, the existence of repeated prior rounds of conflict, and the scale of the day itself. What that record does not supply is a mechanism connecting the standing conditions to the date, which is the question the assessments below take up.

Is it often said the attack answered the blockade?

Closure measures on Gaza were in place for 16 years before the attack, from 2007, per the Congressional Research Service (2024), and Hamas’s own statement of 7 October 2023 named the occupation, the blockade, settlement expansion and settler violence. All four conditions were present across each of those 16 years.

It is often said that the attack was an answer to the blockade. The provenance of that account is solid, and it is worth stating exactly where it comes from: it is the account the attacking party gave of itself on the day, summarized in the Congressional Research Service’s 2024 briefing. The conditions it names are documented in the same official record. Nothing about that account is unsourced.

What a statement of this kind records is a claim about motive, made by a party to the events, which is a different category of evidence from a measured finding or a court record. The Institute’s separate report on the blockade and the assessments issued about it sets out what each body has published about the closure regime itself.

The arithmetic point sits underneath the claim rather than against it. A condition continuously in place across 16 years is consistent with a grievance and dates it to 2007; it does not by itself distinguish 7 October 2023 from any other date in that span. The published work that addresses the date does so through other material: the planning horizon, the intelligence picture, the calendar and the regional environment. Those are the subjects of the four sections that follow, and each rests on a different tier of evidence.

How long before the attack was it planned?

Preparation ran over years rather than weeks. The Combating Terrorism Center at West Point’s 2023 assessment of the intelligence failings describes multi-year training and rehearsal by Hamas, together with operational planning material recovered after the assault, and it treats that preparation as the baseline against which the pre-attack assessment must be judged.

No published assessment in this record fixes a start date for the planning. “Years” is the resolution the evidence supports, and the absence of a first date is a fact about what has been published rather than a gap that can be closed by estimate.

The peer-reviewed literature addresses origins rather than chronology. A 2026 article in Terrorism and Political Violence, The Strategic Origins of Hamas’s October 7 Attack, argues that Hamas came to read the regional strategic environment as permitting an attempt to defeat Israel militarily. That is an interpretive argument about how a decision was reached, offered as such by its author, and it is not a documentary timeline of when preparation began.

The distinction matters for what any reader can take from the two sources together. The West Point assessment is an evidence-based account of what was prepared and what was recovered; the journal article is an analysis of why. Neither one produces a count of months, and neither claims to. Where the two agree is on scale: a rehearsed, multi-axis operation of this kind is not assembled inside the window of a single escalation, which is why the assessments treat the standing conditions and the operational date as separate questions.

What did Israeli intelligence hold before the attack?

Israeli intelligence held that Hamas was deterred. The Combating Terrorism Center at West Point’s 2023 assessment of the intelligence failings finds that warning material existed and was read within a prevailing assessment that Hamas sought to govern the Gaza Strip and to avoid a large ground assault, and it treats that framework, rather than an absence of information, as the failure it examines.

The assessment also takes up the readiness of the forces along the Gaza perimeter as part of the same failure. It is a research-centre assessment published by the United States Military Academy’s Combating Terrorism Center, not a finding by an Israeli commission, and it is labelled here as that.

The Israeli figures for the day and for the war that followed come from Israeli sources reporting on themselves. The Begin-Sadat Center for Strategic Studies records 1,184 Israelis confirmed killed on 7 October 2023 without crediting an official body for the count. The Israel Defense Forces publish their own operational counts through spokesperson briefings, and their own ethical code and investigation machinery through the Military Advocate General’s Corps, all of which are the party’s own published material and none of which addresses the pre-attack assessment.

That leaves the pre-attack intelligence picture documented, in this record, by one named assessment from one named institution, dated 2023. A reader weighing it should know both what it is and what it is not: a published analysis of warning indicators and the framework applied to them, not a state inquiry with subpoena power and not an independently audited reconstruction of what any Israeli body held on any given date.

Did Saudi normalization talks shape the timing?

Normalization does not appear among the four grievances Hamas named in its own statement of 7 October 2023, which the Congressional Research Service (2024) records as the occupation, the blockade, settlement expansion and settler violence. The connection to Israeli and Saudi normalization diplomacy is an inference drawn by named analysts, not a documented objective in the party’s own text.

The Center for Strategic and International Studies published that reading in 2023 in an analysis titled Why Hamas Attacked When It Did, which sets the assault against the regional environment of the period, including normalization diplomacy. The 2026 Terrorism and Political Violence article makes the adjacent argument that Hamas judged the regional strategic environment to have opened an opportunity.

These are two named analyses, dated, by identifiable publishers, and they are evidence of what informed analysts concluded from the environment. They are not evidence of what was decided, because no document of intent naming normalization has been published. The difference is the difference between one party’s own statement of four grievances and a reading of the strategic context around it, and a reader can hold both without merging them.

The record supports a plain summary. The claim that Hamas sought to disrupt Arab-Israeli normalization is an analytical interpretation held by named institutions since 2023; the claim that Hamas cited occupation, blockade, settlement expansion and settler violence is a statement the party issued on the day. Both belong in an account of the background, labelled by what each one is.

Why did the assault fall on that particular date?

7 October 2023 was Simchat Torah and a Saturday, and it fell one day after the 50th anniversary of the 6 October 1973 war, per the Congressional Research Service’s 2023 FAQ for Congress. The assault opened in the early morning with rocket fire alongside simultaneous ground breaches into communities and military positions along the Gaza perimeter.

The calendar facts are checkable and require no interpretation: a Jewish festival, the Sabbath, and a half-century anniversary of the previous surprise attack across an Israeli border. They fix what the date coincided with. They do not establish which of those coincidences the planners weighed, and no published document of intent in this record ranks them.

A peer-reviewed 2024 account of the mass casualty incident in southern Israel documents the medical consequence of the operational design: near-simultaneous attacks across multiple civilian communities and military positions on a single morning, producing casualty flows that arrived at receiving hospitals together rather than in sequence. That is a study of a health system’s response, and it is cited here for what it records about the shape of the day.

The West Point assessment ties the date back to the intelligence question rather than to the calendar. Its subject is the state of readiness along the perimeter and the assessment framework that shaped it, which is why the widely repeated observation about reduced staffing on a holiday weekend is treated in that literature as a component of the failure under examination rather than as an independent cause.

So the answer to the timing question has three published parts and one gap. The calendar is documented, the operational shape is documented, the readiness posture is assessed, and the weighting among them is not recorded anywhere a reader can check.

What did the two years before October 7 record?

The years before the attack recorded a further round of Israel-Hamas conflict and a documented escalation in the West Bank, which the Congressional Research Service (2024) sets out as the immediate background. One measured trace of that cycle sits in the peer-reviewed literature: 26.9% of 1,504 UK comments on leading media Facebook pages reacting to the May 2021 escalation were antisemitic (Becker, Ascone and Troschke, 2022).

That study coded 4,500 comments, 1,500 per language, against a scheme built on the International Holocaust Remembrance Alliance definition. The comparable shares were 12.6% of 1,500 French comments and 13.6% of 1,520 German comments. Thread context was needed to infer the antisemitic meaning in 38.7% of the UK antisemitic comments, so the measure is not a keyword count.

The escalation in the West Bank across 2022 and 2023 is recorded in the Congressional Research Service briefing as part of the immediate background. The Institute’s separate report on settler violence and the land record sets out what the official records and mapped counts hold on that subject.

Search attention moved in the same period. Google Trends’ indexed annual average for the query “antisemitism” in United States web search rose from 10 in 2021 to 24 in 2022, then to 36 in 2023, on an index scaled to the peak month in the 2015 to 2025 range. That series measures search attention alone, not the prevalence of antisemitism or of antisemitic content, and is comparable only within the one query, region and range.

Where do analysts disagree about Hamas’s motives?

Three published accounts give three explanations. Hamas’s own statement of 7 October 2023 names the occupation, the blockade, settlement expansion and settler violence, per the Congressional Research Service (2024). A 2026 peer-reviewed article in Terrorism and Political Violence argues Hamas judged the regional environment to permit a military attempt against Israel. The Center for Strategic and International Studies’ 2023 analysis sets out revenge for earlier Israeli actions, arrests of Hamas figures, isolation and prior bombardment of Gaza.

The three overlap on the grievance set and diverge on what turned grievance into operation. The Terrorism and Political Violence article locates the decision in a strategic judgment about opportunity; the Center for Strategic and International Studies analysis distributes it across accumulated causes; the party’s own statement offers no account of timing at all.

None of the three can be checked against a recorded decision. Motive is not a measured quantity, and no published document sets out how any planner weighted the factors each account names. What can be stated with confidence is the tier each occupies: one party’s own claim, one peer-reviewed interpretation and one organizational analysis, all dated, none of them a record of intent.

How does the background framing travel in measured discourse?

The Community Security Trust recorded 2,699 antisemitic incidents across the United Kingdom between 7 October and 31 December 2023, a 589% rise on the 392 it recorded across the same dates in 2022, on its own definitions and from voluntary reports rather than police data. That is the largest year-on-year rise in its published series for a comparable window.

In Germany, Bundesverband RIAS verified 202 antisemitic incidents connected to the attacks between 7 and 15 October 2023, against 59 documented by its offices in the same window of 2022, an increase RIAS states as at least 240% because reports were still arriving at the editorial cut-off. In Austria, the Jewish Community of Vienna’s reporting centre counted 1,147 incidents for 2023 against 719 in 2022, with its daily average moving from 1.55 before 7 October to 8.31 after.

Sear and Johnson (2023, preprint) report that antisemitic content across a multi-platform hate network rose almost instantaneously in the minutes following the attack of 7 October 2023, before Israel had responded militarily, while Islamophobic content rose to a much lesser extent.

The conflict discourse that followed carried organized amplification. Elmas and colleagues (2026, preprint) identified 11 coordinated groups involving 541 accounts within 4,570,633 tweets from 1,521,433 users between 1 September and 15 December 2023; of 191 highly amplified coordinated posts, 12 were assessed as misleading, and the authors describe the landscape as fragmented rather than centrally controlled.

On how framings of the background relate to attitudes, Enstad (2026), across two nationally representative Norwegian surveys (N = 1,575 and a preregistered replication at N = 1,653), found endorsement of Holocaust inversion associated with justification of harassment and violence against Jews. Ozer, Obaidi and Bergh (2025), in two British experiments (N = 354 and N = 490), found two separate pathways to anti-Jewish hostility. Both are correlational. The Institute’s report on how the atrocities have been justified treats the catalogued frames themselves.

Methodology and limitations

This report assembles the published record of what preceded the attack of 7 October 2023, drawing on four kinds of source and labelling each where it appears.

Official records. The US Congressional Research Service’s briefings for Congress (R47828, 2024; R47754, 2023) supply the chronology, the casualty and hostage approximations, and the summary of the rationale Hamas stated. The Congressional Research Service reports to Congress and its products are official records; its figures carry the qualifiers it publishes them with, and “about 1,200” and “about 251” are its own wording.

A party’s own counts. Figures from the Israeli Ministry of Foreign Affairs on hostages, and from Israel Defense Forces publications, are the reporting of a party to the events and are attributed as that party’s own counts, never as independently verified. Hamas’s statement of 7 October 2023 is likewise treated as that party’s own account of its motives, which records a claim rather than establishing a cause.

Assessments and peer-reviewed research. The Combating Terrorism Center at West Point’s 2023 assessment is a research-centre analysis of the intelligence failings, not a state inquiry. The 2026 Terrorism and Political Violence article and the 2024 peer-reviewed account of the mass casualty incident are peer-reviewed. The 2023 Center for Strategic and International Studies analysis is a named research organization’s interpretation. Sear and Johnson (2023) and Elmas and colleagues (2026) are preprints and are labelled as such at first use.

Monitoring counts. The Community Security Trust, Bundesverband RIAS and the Jewish Community of Vienna’s reporting centre each count on their own definitions, from incidents members of the public choose to report to them. None is an official crime statistic, none is interchangeable with police recorded crime, and their totals cannot be summed or set against each other. The Community Security Trust states that its definition is narrower than the criminal justice system’s, that its counts mix crimes with non-crime incidents, and that under-reporting is assumed; RIAS calls its October 2023 count a preliminary snapshot, so its stated increase is a floor.

Limitations. No published assessment in this record fixes a start date for the planning, and none ranks the factors behind the choice of date. Motive is not a measured quantity in any of the three accounts set out above. The findings on discourse and attitudes are associations reported by their authors in correlational terms, and are carried here in those terms.

Conclusion

So what does the record show preceded 7 October 2023? A governing arrangement and closure regime dated by the Congressional Research Service to 2007 and unchanged in kind for 16 years; a party statement issued on the day naming four standing conditions; a preparation programme the Combating Terrorism Center at West Point’s 2023 assessment measures in years; an Israeli assessment that Hamas was deterred; a date that was a festival, a Sabbath and a 50-year anniversary; and about 1,200 people killed and about 251 taken hostage.

The parts sit at different distances from the record. The chronology and the calendar are documented and checkable. The planning horizon is assessed, not dated. The motive is claimed by one party, interpreted by a peer-reviewed article and distributed across causes by a named research organization, and no document of intent settles among them. What followed is measured: 2,699 antisemitic incidents in the United Kingdom in 86 days on the Community Security Trust’s own definitions, 202 verified in Germany in 9 days on RIAS’s, and, in Sear and Johnson’s preprint reading, a rise in antisemitic content across a multi-platform network in the minutes after the attack and before any military response.

That last measurement is the one that bears on why the Institute studies background questions at all. The account a reader is handed of what preceded an event is not inert; it circulates, it is used as justification, and in the Norwegian survey evidence certain framings of the conflict are associated with justification of aggression against Jews. Whether an explanation of the background is doing explanatory work or something else depends on which of its parts are documented and which are asserted. Every reader who repeats one of these accounts is choosing between the two, usually without knowing the difference is there. Which parts of the story you carry, and what you take each part to be, is the choice this record puts in front of you.

Frequently Asked Questions

How many hostages taken on 7 October have been returned?

The Israeli Ministry of Foreign Affairs stated on 14 September 2025 that 207 hostages had returned or been recovered, 148 alive and 59 deceased, with 48 remaining in captivity. Those are Israel’s own reported counts as a party to the conflict, not independently verified figures.

Why do the UK and German incident counts differ so much in size?

The Community Security Trust counted 2,699 incidents across 86 days for the whole United Kingdom, while Bundesverband RIAS verified 202 across 9 days for incidents connected to the attacks. The windows, the countries, the inclusion criteria and the categories differ, so the two totals answer different questions and cannot be compared directly.

How complete are monitoring organizations’ incident counts?

They are floors. The Community Security Trust cites a 2018 EU Agency for Fundamental Rights survey finding that 21% of British Jews who experienced antisemitic harassment reported it anywhere, and says its statistics should be read as indicative of trends rather than absolute measures. RIAS describes its October 2023 count as a preliminary snapshot.

Is there a published figure for how many years the attack was planned?

No such figure appears in this record. The Combating Terrorism Center at West Point’s 2023 assessment describes multi-year training, rehearsal and recovered planning material without fixing a start date, and the 2026 Terrorism and Political Violence article analyses strategic origins rather than dating them.

What kind of evidence is a statement issued by a party to a conflict?

It is that party’s own account of its motives, which records what was claimed rather than establishing what caused an action. The Congressional Research Service summarizes Hamas’s 7 October 2023 statement in that form, naming the occupation, the blockade, settlement expansion and settler violence.

What happened to search attention for antisemitism after the attack?

Google Trends’ indexed annual average for the query “antisemitism” in United States web search rose from 24 in 2022 to 36 in 2023 and stood at 38 in 2025, on an index where the peak month of the 2015 to 2025 range is 100. The series measures search attention only.

Sources

• Anti-Defamation League, 2023 to 2024. October 7 Hamas Attack on Israel; October 7th War Timeline: Key Events and Issues. adl.org. Monitoring organization (advocacy mission).
• Becker, M., Ascone, L., Troschke, H., 2022. Antisemitic comments on Facebook pages of leading British, French, and German media outlets. Humanities and Social Sciences Communications. DOI 10.1057/s41599-022-01337-8. Peer-reviewed.
• Begin-Sadat Center for Strategic Studies, 2025. The Gaza Terror Offensive, situation report to 5 September 2024. besacenter.org. Research institute.
• Bundesverband RIAS, 2023. Antisemitische Reaktionen in Deutschland auf die Hamas-Massaker in Israel, 7 to 15 October 2023. report-antisemitism.de. Monitoring organization.
• Center for Strategic and International Studies, 2023. Why Hamas Attacked When It Did. csis.org. Research organization analysis.
• Combating Terrorism Center at West Point, 2023. The October 7 Attack: An Assessment of the Intelligence Failings. ctc.westpoint.edu. Research-centre assessment.
• Community Security Trust, 2024. Antisemitic Incidents Report 2023. cst.org.uk. Monitoring organization (community security body).
• Elmas, T., Silva, M., Pote, M., and colleagues, 2026. Israel-Hamas War on X: A Case Study of Coordinated Campaigns and Information Integrity. arXiv:2604.10566. Preprint.
• Enstad, J., 2026. Holocaust Inversion and Justification of Anti-Jewish Aggression: Evidence from Two National Surveys in Norway. DOI 10.1037/amp0001704. Peer-reviewed.
• Google Trends, 2026. Search interest for antisemitism, United States web search, 2015 to 2025. trends.google.com. Aggregated indexed data.
• Israel Ministry of Foreign Affairs, Permanent Mission to the Multilateral Organizations in France, 2025. Israel’s Objectives and Current Operation, current to 14 September 2025. embassies.gov.il. Israeli government body, self-reported.
• Israelitische Kultusgemeinde Wien, Antisemitismus-Meldestelle, 2024. Antisemitic cases 2023 in Austria. antisemitismus-meldestelle.at. Monitoring organization.
• October 7th 2023 mass casualty incident in southern Israel, 2024. PMCID PMC11556145. Peer-reviewed.
• Ozer, S., Obaidi, M., Bergh, R., 2025. The Impact of Globalized Conflicts: Attitudes Toward Jews Among Britons in the Political Context of the War in Gaza. International Journal of Intercultural Relations. DOI 10.1016/j.ijintrel.2025.102184. Peer-reviewed.
• Sear, R., Johnson, N., 2023. Unprecedented Reach and Rich Online Journeys Drive Hate and Extremism Globally. arXiv:2311.08258. Preprint.
• Terrorism and Political Violence, 2026. The Strategic Origins of Hamas’s October 7 Attack. DOI 10.1080/1057610X.2026.2613426. Peer-reviewed.
• US Congressional Research Service, 2023. Israel and Hamas October 2023 Conflict: Frequently Asked Questions, R47754. congress.gov. Official record.
• US Congressional Research Service, 2024. Israel and Hamas Conflict In Brief: Overview, U.S. Policy, and Options for Congress, R47828. congress.gov. Official record.