Complex sentence: Mickl's division achieved its objectives during XLVIII Panzer Corps's preliminary operation on the afternoon of 4 July, and commenced its main assault at 06:00 on 5 July, but its progress was hampered by minimal air support, difficult terrain and constant Soviet counterattacks.
Split into simpler sentences: Mickl's division achieved its objectives during the preliminary operation, and commenced its main assault at 06:00 on 5 July. Its progress was hampered by minimal air support, difficult terrain and constant Soviet counterattacks.