The main thrust of Operation Horev was in the south, and on December 25–27, Israeli forces captured the
Beersheba–
'Auja road, including Bir 'Asluj. The Southern Command decided to exploit this success in order to complete the rest of Operation Horev, namely, to surround and eventually expel all Egyptian forces from Palestine. The order was given to move into the Sinai Peninsula on the morning of December 28. This order directly contradicted the
General Staff plan, which forbade entering Egyptian territory. According to
Yitzhak Rabin, then the operations officer of the Southern Command, the command attempted to create
facts on the ground before getting the necessary approval for the action. The original Southern Command plan called for the thrust to be done by the 8th Brigade, but it had not had time to recover from the Battle of 'Auja, and it was necessary to quickly overwhelm the Egyptian forces in the peninsula, so the Southern Command decided to send the Negev Brigade instead. Abu Ageila was a small oasis in the desert situated on an important road junction. It contained a few clay houses and a village, a
water well and a dam for water collection in the winter months.
Operation Beginning While the battles on the Beersheba–'Auja road were raging, the IDF initiated Operation Beginning (,
Mivtza Hatḥala) with the aim of cutting off supply to the Egyptian forces in Gaza by destroying sections of the
coastal railway. At 11:15 on December 26, a force of sappers rendezvoused with the
Israel Navy and two patrol boats, INS ''Sa'ar
and INS Palmach'', landed the troops in the Sinai, between
al-Arish and
Rafah, at 21:45. The sappers planted their bombs on the 235th kilometer of the railway, returned to their ships at 03:00 on December 27, and the charges blew at 06:00. ==Battle of Umm Katef==