Operation Horev was a large scale offensive against the Egyptian army in the Western Negev at the end of the Arab–Israeli War in 1948 and 1949. Its objective was to trap the Egyptian Army in the Gaza Strip. The operation started on 22 December 1948 and ended on 7 January 1949, after the British threatened to intervene.
Horev is the name given in the Scriptures for Mount Sinai, where the Israelites encamped for a year (Exodus 3:1 and Psalms 106:19): in modern parlance it is called the Jebel Musa ("Mount of Moses" in Arabic).
The first objective of the offensive was the Egyptian army units defending al-Auja on the Palestinian-Egyptian border. From there the major thrust was to the Egyptian army bases at El-Arish. This would trap the majority of the Egyptian army in the Gaza Strip.
The operation's commander was Yigal Alon. Five Israeli brigades were involved: The 8th Armoured Brigade commanded by Yitzhak Sadeh; the Negev Brigade; the Golani Brigade; the Harel Brigade; and the Alexandroni Brigade. Their task was to maintain the siege of the 4,000 strong Egyptian brigade at Faluja. The Egyptians had a further two brigades in the Gaza area, and one more brigade across the border near El-Arish.
On 22 December a battalion from the Golani brigade launched a diversionary attack on positions near the Gaza-Rafah road. In preparation for the offensive, the Israeli army had been able to clear a route through the desert, by-passing the defences on the Beersheba to al-Auja road. On 27 December 1948 the Armoured Brigade attacked al-Auja from this unexpected quarter. After 24 hours of fighting, the Egyptians surrendered in disarray. With this victory Alon realised that there were no Egyptian defences left west of el-Arish and was prepared to capture the entire Sinai peninsula. The Negev brigade followed the tanks of the 8th brigade across the Egyptian border on the night of 28 December and moved towards El-Arish. By 30 December 1948 they were on the outskirts of the town's airfield. At the same time units from the Harel brigade moved further west into Sinai. On 29 December the United Nations Security Council ordered a cease-fire.