October 7, 2023 — Comprehensive Resource Report
What happened, who carried it out, and where to research it October 7, 2023 was the day Hamas and other Palestinian armed groups launched a coordinated attack from the Gaza…
What happened, who carried it out, and where to research it
October 7, 2023 was the day Hamas and other Palestinian armed groups launched a coordinated attack from the Gaza Strip into southern Israel. The attack began around 6:30 a.m. with a large rocket barrage, followed by infiltrations by land, sea, and air into Israeli communities, military positions, roads, and the Nova music festival area. (United Nations)
The attack killed approximately 1,200 people according to U.S. government reporting and resulted in the abduction of more than 240 people; later Israeli and international investigations have used slightly different figures depending on how deaths and hostages were classified. (State Department)
1. Who was behind October 7?
Hamas — the principal organization
The attack was led and coordinated by Hamas, particularly its military wing, the Izz ad-Din al-Qassam Brigades.
The UN Independent International Commission of Inquiry concluded that the operation was premeditated and planned over a significant period, involving substantial organization and coordination. It concluded that Hamas led the attack and that its military wing, together with other Palestinian armed factions, implemented it. (United Nations)
Hamas therefore represents the central organization to study when researching the planning, command structure, preparation and execution of October 7.
Other armed groups
October 7 was not carried out exclusively by Hamas.
Human Rights Watch independently identified participation by at least five Palestinian armed groups:
- Hamas — Qassam Brigades
- Palestinian Islamic Jihad — Quds Brigades
- Democratic Front for the Liberation of Palestine — National Resistance Brigades
- Popular Front for the Liberation of Palestine — Abu Ali Mustafa Brigades
- Al-Aqsa Martyrs Brigades
HRW found evidence of participation through video, CCTV, body-camera footage, organizational insignia and claims posted by the groups themselves. (Human Rights Watch)
The UN investigation similarly concluded that Hamas and other Palestinian armed factions participated, with some Palestinian civilians also directly participating in the hostilities. (United Nations)
2. What happened?
The operation had several simultaneous components.
Rocket attack
At approximately 6:30 a.m., thousands of rockets and mortar rounds were fired from Gaza toward Israel.
The barrage helped create confusion and overwhelm Israeli defenses while the ground assault began. The UN Commission documented deaths from rocket and mortar attacks as well as the ground assault. (United Nations)
Border breach
Attackers crossed the Gaza-Israel barrier at numerous locations.
They used:
- Motorcycles
- Vehicles
- Paragliders
- Boats
- Explosives
- Breached sections of the border barrier
Attackers then moved into Israeli communities and military installations.
Civilian communities
Among the communities attacked were:
- Be’eri
- Kfar Aza
- Nir Oz
- Re’im
- Mefalsim
- Sderot
- Other communities and locations near the Gaza border
The UN investigation documented attacks on at least 24 localities and public spaces, including civilian communities and the Nova festival. (United Nations)
3. The Nova music festival
One of the most internationally recognized locations was the Nova/Supernova music festival near Re’im.
Festivalgoers were attacked while attempting to escape the area.
The attack became one of the defining symbols of October 7 because many of the victims were young civilians attending a music festival.
4. Hostages
Hostage-taking was a major component of the operation.
Palestinian armed groups transported civilians and Israeli security personnel into Gaza.
Human Rights Watch reports that 251 people were taken hostage according to Israeli authorities and independent media. (Human Rights Watch)
Those abducted included:
- Children
- Elderly people
- Women
- Men
- Foreign nationals
- Israeli soldiers
The UN Commission concluded that hostage-taking constituted a violation of international humanitarian law and documented physical, psychological and sexual violence associated with some abductions. (United Nations)
5. The killings and treatment of civilians
The October 7 attack involved extensive killings of civilians.
The UN Commission documented:
- Deliberate killings
- Shooting of civilians
- Abductions
- Burning of homes
- Mistreatment
- Desecration of corpses
- Sexual violence
- Attacks on civilian shelters
- Attacks on people attempting to flee
The Commission concluded that Hamas and other Palestinian armed groups committed war crimes, including intentionally attacking civilians and taking hostages. (United Nations)
Human Rights Watch independently concluded that the murder of civilians and hostage-taking formed part of the attack and constituted crimes against humanity. (Human Rights Watch)
Amnesty International’s later investigation likewise documented murder, hostage-taking, torture and other violations by Hamas and other Palestinian armed groups. (Amnesty International)
6. What about sexual violence?
This is an area where careful sourcing is particularly important because numerous claims circulated immediately after October 7, some of which were later challenged or found unsupported.
The UN Commission ultimately concluded that sexual violence occurred during the October 7 attacks, documenting cases associated with several locations, including the Nova festival, Route 232, Nahal Oz, Be’eri, Nir Oz and Kfar Aza. (United Nations)
At the same time, the Commission explicitly said that it was unable to verify some specific allegations, and it discounted certain claims that it found false, inaccurate or contradictory. (United Nations)
That distinction is important if you’re producing journalism: use the documented cases rather than repeating every allegation that appeared on social media.
7. Was Iran behind October 7?
This requires a distinction between Iran’s long-term support for Hamas and direct Iranian operational responsibility for October 7.
The U.S. government has documented that Iran provides Hamas with funding, weapons and training. (State Department)
However, the available U.S. assessments did not establish that Iran directly ordered or operationally planned the October 7 attack.
A Congressional Research Service review records that U.S. officials described Iran as broadly complicit because of its longstanding support for Hamas, while also stating that there was no evidence at the time that Iran directly directed or orchestrated the attack. (Congress.gov)
So the careful journalistic formulation is:
Hamas led and coordinated October 7. Iran was a longstanding financial, military and training supporter of Hamas, but publicly available U.S. assessments did not establish that Iran directly ordered or operationally planned the October 7 attack.
That is much stronger journalism than simply saying “Iran did it.”
8. Hezbollah’s role
Hezbollah is another important organization to research because it is part of Iran’s regional network and subsequently became involved in the broader conflict.
However, Hezbollah should not be presented as the organization that carried out October 7.
The principal perpetrators of the October 7 operation were Hamas and other Palestinian armed groups operating from Gaza. (Human Rights Watch)
9. Israeli intelligence and security failures
A complete October 7 report should also investigate how the attack succeeded.
The attack exposed major Israeli intelligence, military and border-security failures.
The Congressional Research Service notes several explanations that have been examined, including:
- Possible missed warning signs
- Overreliance on technological defenses
- Misreading Hamas’s intentions
- Failures in intelligence interpretation
- Failures in operational preparedness
This is an important part of the story because explaining how Hamas succeeded is different from explaining why Hamas attacked.
10. The immediate aftermath
Israel responded militarily beginning on October 7.
On October 8, Israel formally announced Operation Swords of Iron.
Israel subsequently:
- Mobilized hundreds of thousands of reservists
- Conducted extensive air operations against Gaza
- Began ground operations
- Attempted to destroy Hamas’s military and governing capabilities
- Sought the recovery of Israeli hostages
The October 7 attack therefore became the immediate trigger for the subsequent Israel-Hamas war. (United Nations)
11. Best primary and investigative resources
For Peter’s World, I would build an October 7 resource page around these sources rather than relying primarily on social media.
Israeli government / emergency-response material
Israel National Rescue / Magen David Adom material
The Israeli government has assembled a detailed October 7 resource containing timelines, locations, photographs, videos and explanations of the attack.
Israel’s October 7 resource — What Happened (GovExtra)
United Nations investigation
The UN Independent International Commission of Inquiry is one of the most important independent investigative sources.
UN Commission detailed findings on October 7 (United Nations)
Its report provides evidence concerning:
- The attack’s planning
- Hamas’s leadership
- Other participating factions
- Civilian deaths
- Hostage-taking
- Sexual violence
- Individual locations
- International humanitarian law
Human Rights Watch
Human Rights Watch conducted interviews with 94 survivors and another 50 people, including relatives, first responders, medical experts, local officials and journalists. (Human Rights Watch)
Human Rights Watch — October 7 investigation
Amnesty International
Amnesty’s investigation provides another independent human-rights investigation into killings, hostage-taking and abuses.
Amnesty International — Targeting Civilians report (Amnesty International)
U.S. Department of State
The State Department’s Country Reports on Terrorism 2023 provides the U.S. government’s account of Hamas, the attack and Iran’s support network.
U.S. State Department — Country Reports on Terrorism 2023 (State Department)
Congressional Research Service
The Congressional Research Service is particularly useful for separating established facts from unresolved questions concerning Iran’s involvement.
Congressional Research Service — Israel and Hamas 2023 Conflict (Congress.gov)
12. The simplest way to understand October 7
You can think of the event in six layers:
| Layer | What to investigate |
|---|---|
| 1. Planning | How Hamas prepared the operation |
| 2. Command | Hamas leadership and Qassam Brigades |
| 3. Execution | Rockets, border breaches and infiltration |
| 4. Targets | Military bases, communities and Nova festival |
| 5. Hostages | Abduction and transportation into Gaza |
| 6. Aftermath | Israeli military response and regional war |
And then add a seventh:
7. External support — Iran, weapons, financing, training and regional networks.
The key distinction is that Hamas is directly responsible for leading the October 7 operation, while Iran’s role is best described as long-term support to Hamas rather than an established direct command role in the attack itself. (Human Rights Watch)
For a journalism project, that distinction will make your report considerably more credible.
