Complex sentence: The three Gharwal battalions to the left advanced in lines of platoon fifty paces apart, swiftly crossed the of no man's land and overran the German infantry, then pressed on to the German support trench, the attack taking only fifteen minutes to complete.
Split into simpler sentences: The three Gharwal battalions to the left advanced in lines of platoon fifty paces apart, swiftly crossed the of no man's land and overran the German infantry. The Indian troops then swiftly pressed on to the German support trench, the attack taking only fifteen minutes to complete.