An armed conflict between Israel and Hamas-led Palestinian militant groups has been taking place chiefly in the Gaza Strip since 7 October 2023. Clashes have also occurred in the Israeli-occupied West Bank and with Hezbollah along the Israel–Lebanon–Golan Heights border. The fifth war of the Gaza–Israel conflict since 2008, it is part of the broader Israeli–Palestinian conflict, and the most significant military engagement in the region since the Yom Kippur War 50 years earlier.

On 7 October 2023, Hamas and several other Palestinian militant groups launched coordinated armed incursions from the Gaza Strip into the Gaza envelope of southern Israel, the first invasion of Israeli territory since the 1948 Arab–Israeli War. Hamas and other Palestinian armed groups named the attacks Operation Al-Aqsa Flood, while in Israel they are referred to as Black Saturday or the Simchat Torah Massacre, and internationally as the 7 October attack. The attacks consequently started the ongoing Israel–Hamas war.