Complex sentence: Following heavy losses from MiG-15 fighters No.77 Squadron operated in the ground attack role from December 1951 until the end of the war; it remained in South Korea on garrison duties until returning to Australia in November 1954.
Split into simpler sentences: Following heavy losses from MiG-15 fighters No.77 Squadron operated in the ground attack role from December 1951 until the end of the war. Following the end of the Korean War the Squadron remained in South Korea on garrison duties until returning to Australia in November 1954.