Al-Qassam Brigades in the context of "Palestinian nationalism"

The Islamic Resistance Movement, abbreviated Hamas (an acronym from the Arabic: حركة المقاومة الإسلامية, romanized: Ḥarakat al-Muqāwamah al-ʾIslāmiyyah), is a Sunni Islamist Palestinian nationalist political organisation with a military wing known as the al-Qassam Brigades. It has governed the Israeli-occupied Gaza Strip since 2007.

The Hamas movement was founded by Palestinian Islamic scholar Ahmed Yassin in 1987, after the outbreak of the First Intifada against the Israeli occupation. It emerged from his 1973 Mujama al-Islamiya Islamic charity affiliated with the Muslim Brotherhood. Initially, Hamas was discreetly supported by Israel, as a counter-balance to the secular Palestinian Liberation Organisation (PLO) to prevent the creation of an independent Palestinian state. In the 2006 Palestinian legislative election, Hamas secured a majority in the Palestinian Legislative Council by campaigning on promises of a corruption-free government and advocating for resistance as a means to liberate Palestine from Israeli occupation. In the 2007 Battle of Gaza, Hamas seized control of the Gaza Strip from rival Palestinian faction Fatah. It has since governed the territory separately from the Palestinian National Authority, and has been criticized for human rights violations. After Hamas's takeover, Israel significantly intensified existing movement restrictions and imposed a complete blockade of the Gaza Strip. Egypt also began its blockade of Gaza at this time. This was followed by multiple wars with Israel, including those in 2008–09, 2012, 2014, 2021, and an ongoing one since 2023, which began with the October 7 attacks.

As Palestinians have not had a fully-recognized state with a regular army, much of Palestinian political violence in the context of the Israeli–Palestinian conflict has taken the form of insurgency. Common objectives of political violence by Palestinian groups include self-determination in or sovereignty over the region of Palestine, seeking a one-state solution, or the recognition of a Palestinian state. This includes the objective of ending the Israeli occupation. Goals also include the release of Palestinian prisoners held by Israel and recognition of the Palestinian right of return.

Palestinian groups that have been involved in politically motivated violence include the Palestine Liberation Organization (PLO), Fatah, the Popular Front for the Liberation of Palestine (PFLP), the Popular Front for the Liberation of Palestine – General Command (PFLP-GC), the Democratic Front for the Liberation of Palestine, the Abu Nidal Organization, the Palestinian Islamic Jihad, and Hamas. Several of these groups are considered terrorist organizations by the governments of the United States, Canada, the United Kingdom, Japan, New Zealand and the European Union.

The Nukhba forces (Arabic: قوات النخبة, romanized: Quwwāt an-Nukhba), Nukhba Force or just (Al-)Nukhba (Arabic: النخبة, lit. 'the elite'; Hebrew: הנוח׳בה, romanized: HaNukhba) is the special forces unit of Al-Qassam Brigades, the military wing of Hamas. The term is frequently used to refer to Hamas militants. In 2024, the usage of the word roughly corresponds to "Hamas militant" or "Hamas commando".

Israel claims the unit led the October 7 attacks on October 7, 2023, at the beginning of the Gaza war.