sentences:  Almost immediately thereafter, on 7 September, Arz was given command of the 6th corps, taking over from Boroević, who had been appointed to command the Third Army.In charge of the 6th Corps, he performed outstandingly and with great energy at Limanowa-Lapanów, where his unit formed part of the 4th Army.At Gorlice-Tarnów he was again to play an outstanding role and was in command again at Grodek-Magierow and Brest-litowsk during the summer of 1915.