Walter Model
It was created on 5 April 1944 by renaming Army Group South under Generalfeldmarschall Walter Model. In April 1944 it consisted of 1st Panzer Army and 4th Panzer Army. In the summer of 1944 it opposed the Red Army's 1st Ukrainian Front during the Lvov-Sandomir strategic offensive operation (13 July - 29 August 1944). In August 1944 the 4th Panzer Army and the 17th Army defended between Carpathian mountains and the Pripyet swamps in Galicia. In September 1944 it was renamed to Army Group A.