The 156th Fighter Air Corps of the 4th Air Army was the next unit to receive the La-7 in October 1944. At one point during the month, they had fourteen aircraft simultaneously unserviceable with engine failures. By 1 January 1945 there were 398 La-7s in front-line service of which 107 were unserviceable. By 9 May 1945 this had increased to 967 aircraft, of which only 169 were unserviceable. For the invasion of Japanese Manchuria, 313 La-7s were assigned and only 28 of these were unserviceable on 9 August 1945.