 Complete the following phrase:  In 1974 and 1975 1 Parachute Battalion operated along the Angolan border with S.W.A; along the Caprivi Strip; a platoon jumped near Luiana September 1975, Angola to relieve a group of Bushmen trapped by a SWAPO force; and 3 platoons Joined Operation Savannah at Sá da Bandeira the day after the airport was taken October 1975. The two platoons withdrew in FebruaryMarch 