Complex sentence: During the course of the battle the 122nd Division broke into two columns and suffered heavy casualties, nevertheless the left column managed to reach a position located from Sokol at 6:30 a.m. and take the peak at the end of the day.
Split into simpler sentences: During the course of the battle, the 122nd Division broke into two columns and suffered heavy casualties. The left column managed to reach a position located from Sokol at 6:30 a.m. and take the peak at the end of the day.