How was the Gaza Strip created after the 1948 Arab-Israeli war?

The Gaza Strip was not created as a sovereign state but emerged as a distinct territory following the 1948 Arab-Israeli war.

Following the end of the British mandate in Palestine on May 15, 1948, Egyptian forces entered the town of Gaza, establishing it as the headquarters for their expeditionary force. Heavy fighting throughout the autumn of 1948 resulted in the reduction of the area under Arab occupation to a strip of land approximately 25 miles long and 4–5 miles wide. This specific area became known as the Gaza Strip, with its formal boundaries later demarcated in the Egyptian-Israeli armistice agreement signed on February 24, 1949.1

Following the conflict, the territory remained under Egyptian military rule for much of the period between 1949 and 1967. The region faced significant humanitarian challenges from its inception, primarily due to the influx of large numbers of Palestinian Arab refugees who were displaced during the war and subsequently maintained through the aid of the UNRWA.1