section_path: History
section_name: History
paragraph_text: History
  
  Hamas was established in 1987, and allegedly has its origins in Egypt 's Muslim Brotherhood movement, which had been active in the Gaza Strip since the 1950s and gained influence through a network of mosques and various charitable and social organizations. Unlike other Palestinian factions, after the Israeli occupation of Gaza in 1967, the Brotherhood in Gaza refused to join the resistance boycott against Israel. In the 1980s, it emerged as a powerful political factor, challenging the influence of the PLO, whose Fatah faction it had played a core role in creating. In December 1987, the Brotherhood adopted a more nationalist and activist line under the name of Hamas. Hamas was initially discreetly supported by Israel as a counter-balance to the secular PLO. During the 1990s and early 2000s, the organization conducted numerous suicide bombings and other attacks against Israel.
  
  In the Palestinian legislative election of January 2006, Hamas gained a large majority of seats in the Palestinian Parliament, defeating the ruling Fatah party. After the elections, conflicts arose between Hamas and Fatah, which they were unable to resolve. In June 2007, Hamas defeated Fatah in a series of violent clashes, and since that time Hamas has governed the Gaza portion of the Palestinian Territories, while at the same time they were ousted from government positions in the West Bank. Israel and Egypt then imposed an economic blockade on Gaza and largely sealed their borders with the territory.
  
  After acquiring control of Gaza, Hamas-affiliated and other militias launched rocket attacks upon Israel, which Hamas ceased in June 2008 following an Egyptian -brokered ceasefire. The ceasefire broke down late in 2008, with each side accusing the other of responsibility. In late December 2008, Israel attacked Gaza, withdrawing its forces in mid-January 2009. Since 2009, Hamas has faced multiple military confrontations with Israel, notably the 2012 and 2014 Gaza Wars, leading to substantial casualties. Hamas has maintained control over Gaza, often clashing with the Palestinian Authority led by Fatah. Efforts at reconciliation between Hamas and Fatah have seen limited success. Hamas continued to face international isolation and blockades, while engaging in sporadic rocket attacks and tunnel construction activities against Israel.
  
  On 7 October 2023, Hamas and other Palestinian militants attacked Israel killing nearly 1,200 Israelis, about two thirds of them civilians. Approximately 250 Israeli civilians and soldiers were taken to the Gaza Strip, with the aim of securing the release of Palestinian prisoners in Israel (as part of a prisoner swap). Hamas said its attack was in response to Israel's continued occupation, blockade of Gaza, and settlements expansion, as well as alleged threats to the Al-Aqsa Mosque and the plight of Palestinians. There are also reports of sexual violence by Hamas militants, allegations that Hamas has denied. Israel responded by invading the Gaza Strip, killing over 70,000 Palestinians, 59.1% of them women, children and the elderly according to a peer-reviewed study in The Lancet.
  
  On 31 July 2024, Ismail Haniyeh was assassinated in Tehran, after attending the inauguration ceremony of Iranian president Masoud Pezeshkian. In August 2024, Yahya Sinwar, the leader of Hamas in Gaza, was elected chairman of the group, replacing Haniyeh. Per Hamas officials, he was elected due to his considerable popularity in the Arab and Islamic worlds following the 7 October attacks and his strong connections with Iran and the " Axis of Resistance," an informal Iranian-led political and military coalition. On 16 October 2024, IDF troops killed Sinwar during a routine patrol and a chance encounter in southern Rafah. In January 2025, the Wall Street Journal, citing Israeli sources, reported that Sinwar's younger brother, Mohammed Sinwar (aka Shadow), was leading Hamas. It's sources said that Israel were "working hard to find him" and that Izz al-Din Haddad, of al-Qassam Brigades, were the two most senior commanders in the Gaza Strip. On 19 January 2025, a ceasefire between Hamas and Israel went into effect.
  
  In January 2025, Hamas confirmed that its senior military chief, Mohammed Deif, was killed by Israel 's military in July last year. On 18 March 2025, Israel broke the ceasefire and shelling of the territory continued. In March 2025, Ismail Barhoum, a member of Hamas’s political bureau was killed in an Israeli attack on Nasser Hospital in Khan Younis. In April 2025, according to the IDF, Yahya Fathi Abd al-Qader Abu Shaar, the head of Hamas' weapons smuggling network, was killed by Israeli army. In May 2025, there were unconfirmed reports that Mohammed Sinwar, Hamas leader in Gaza and the brother of Yahya Sinwar, and Muhammad Shabana, commander of the Rafah Brigade, were killed by Israeli airstrike in the southern Gaza Strip. In June 2025, the Israeli military confirmed that it had identified the body of Mohammed Sinwar through DNA checks.