"After World War I, Britain occupied the region and established Mandatory Palestine in 1920. Increased Jewish immigration in the lead-up to the Holocaust and British foreign policy in the Middle East led to intercommunal conflict between Jews and Arabs, which escalated into a civil war in 1947 after the United Nations (UN) proposed partitioning the land between them.
After the end of the British Mandate for Palestine, Israel declared independence on 14 May 1948. Neighbouring Arab states invaded the area the next day, beginning the First Arab–Israeli War. An armistice in 1949 left Israel in control of more territory than the UN partition plan had called for; and no new independent Arab state was created as the rest of the former Mandate territory was held by Egypt and Jordan, respectively the Gaza Strip and the West Bank. The majority of Palestinian Arabs were either expelled or fled in what is known as the Nakba, with those remaining becoming the new state's main minority. Over the following decades, Israel's population increased greatly as the country received an influx of Jews who emigrated, fled or were expelled from the Arab world.
Following the 1967 Six-Day War, Israel occupied the West Bank, Gaza Strip, Egyptian Sinai Peninsula and Syrian Golan Heights. After the 1973 Yom Kippur War, Israel signed peace treaties with Egypt—returning the Sinai in 1982—and Jordan. In 1993, Israel signed the Oslo Accords, which established mutual recognition and limited Palestinian self-governance in parts of the West Bank and Gaza. In the 2020s it normalised relations with several more Arab countries via the Abraham Accords. However, efforts to resolve the Israeli–Palestinian conflict after the interim Oslo Accords have not succeeded, and the country has engaged in several wars and clashes with Palestinian militant groups"