actively involved in Batalik sector, where it exhibited great courage and tenacity, and was awarded the COAS unit citation. 10 Para (SF) was involved in operations at Khalubar Ridge. 9 Para (SF) saw combat at the heights of Zulu Ridge by passing through land mines and clearing them. It was one of toughest operations in the Kargil war. United Nations operations Calls of international peacekeeping have taken airborne units to Korea (1950–54), the Gaza Strip (1956–58), Sierra Leone (2000, as part of UNAMSIL), Congo, Sudan and Ethiopia/Eritrea. The operations in Sierra Leone involved a daring rescue mission conducted by the 2 Para (SF) and 9 Para (SF). Parachute Regiment battalions also have officers/PBOR serving in staff roles or as observers with various United Nations missions. Recent times Recently, two more infantry battalions underwent probation and were re raised as Parachute Regiment battalions by transfer from other regiments. In 2014, the 23rd battalion, Rajputana Rifles was transferred to the Parachute Regiment and redesignated as the 23rd battalion, Parachute Regiment. Simultaneously, the 29th battalion, Rajput Regiment was transferred to the Parachute Regiment and redesignated as the 29th battalion, Parachute Regiment. Mountaineering and South Pole Expedition The Parachute Regiment has historically been active in the field of mountaineering. The late Capt. (later Col.) Avtar Singh Cheema of 7 Para was the first Indian atop Mount Everest in 1965. Capt. Abhijeet Singh from 7 Para also summited the peak while Brig. Saurabh Singh Shekhawat of 21 Para (SF) scaled the peak thrice in 2001, 2003 and 2005, and has also scaled peaks in the French Alps and in Africa. Col Sarfraz Singh of 6 Para led a seven-member team of Nimas to the world's highest peak on 20 May 2018. A Parachute Regiment team scaled Nanda Devi in 1981 when they attempted both main and east peaks simultaneously. The southwest face of Nanda Devi East was climbed for the first time, but both climbers, Premjit Lal and Phu Dorjee, were killed in the descent. Three others – Daya Chand, Ram Singh, and Lakha Singh – also fell to their deaths, leading to the highest ever number of casualties on the mountain. Maj. Jai Bahuguna, a famous climber of the Corps of Engineers who died on Everest, also served with the 50th Parachute Brigade. Maj. (later Maj. Gen.) Mohammed Amin Naik and Capt. (later Col.) Anand Swaroop, also of the Corps of Engineers, summitted Nanda