Suez Crisis: During an invasion of the Gaza Strip, Israeli soldiers shot and killed hundreds of Palestinian refugees and local inhabitants in Khan Yunis.

The Suez Crisis, also known as the second Arab–Israeli war, the Tripartite Aggression in the Arab world and the Sinai War in Israel, was a British–French–Israeli invasion of Egypt in 1956. Israel invaded on 29 October, having done so with the primary objective of re-opening the Straits of Tiran and the Gulf of Aqaba as the recent tightening of the eight-year-long Egyptian blockade further prevented Israeli passage. After issuing a joint ultimatum for a ceasefire, the United Kingdom and France joined the Israelis on 5 November, seeking to depose Egyptian president Gamal Abdel Nasser and regain control of the Suez Canal, which Nasser had earlier nationalised by transferring administrative control from the foreign-owned Suez Canal Company to Egypt's new government-owned Suez Canal Authority. Shortly after the invasion began, the three countries came under heavy political pressure from both the United States and the Soviet Union, as well as from the United Nations, eventually prompting their withdrawal from Egypt. The Crisis demonstrated that the United Kingdom and France could no longer pursue their independent foreign policy without consent from the United States. Israel's four-month-long occupation of the Egyptian-occupied Gaza Strip and Egypt's Sinai Peninsula enabled it to attain freedom of navigation through the Straits of Tiran, but the Suez Canal was closed from October 1956 to March 1957.

The Gaza Strip, also known simply as Gaza, is the smaller of the two Palestinian territories, the other being the West Bank, that make up the State of Palestine in the Southern Levant region of West Asia. Inhabited by mostly Palestinian refugees and their descendants, Gaza is one of the most densely populated territories in the world. An end of 2024 estimate puts the population of the Strip at 2.1 million, which was a 6% decline from the previous year due to the Gaza war. Gaza is bordered by Egypt on the southwest and Israel on the east and north. Its capital and largest city is Gaza City.

The Khan Yunis massacre took place on 3 November 1956, perpetrated by the Israel Defense Forces (IDF) in the Palestinian town of Khan Yunis and the nearby refugee camp of the same name in the Gaza Strip during the Suez Crisis.