Palestinian return to Israel
Following the 1949 Armistice Agreements, which ended the 1948 Arab–Israeli War, many Palestinian Arabs began attempting to cross the Green Line and return to their homes in the recently established State of Israel. Most of these crossings took place from the Jordanian-annexed West Bank and the Egyptian-occupied Gaza Strip, and were largely motivated by dismay among Palestinians who had fled or been expelled from Israeli territory.
Source: Wikipedia — Palestinian return to Israel (CC BY-SA 4.0)