 As support shifted towards the Partisans, Mihailović's Chetniks attempted to recommence Allied support for the Chetniks by displaying their eagerness to help the Allies.This eagerness to help was put into practice when the Office of Strategic Services (OSS) approached Mihailovic's Chetniks in mid 1944 to organise the airlift of downed US airmen.This operation known as the Halyard Mission resulted in the rescue of 417 US airmen that were previously kept safe by Mihailovic's Chetniks.