The RAAF's 77 Squadron, based in Japan, was preparing to return to Australia when President Kim Il-sung's North Korean forces invaded South Korea without warning in the middle of 1950. The two senior American commanders, Lieutenant General George Stratemeyer and General Douglas Macarthur made personal requests for the squadron to take an active part in the defence of the south. The Australian government agreed to this and within days the squadron was in active service.The squadron commenced operations with propeller driven mustang fighters but had to replace these with meteor jet fighters when the Russian-built MIG fighters entered the conflict. 77 Squadron served with distinction for the whole three years of the Korean War suffering many casualties. This is their story.