Complex sentence: Twelve minutes after the artillery bombardment began, the 180th Brigade's three Indian infantry battalions had attacked in two columns, the right column led by the 50th Kumaon Rifles had captured Birket Atife and 110 prisoners along with 8 machine guns.
Split into simpler sentences: Twelve minutes after the artillery bombardment began, the 180th Brigade's three Indian infantry battalions attacked in two columns. The right column, led by the 50th Kumaon Rifles, captured Birket Atife and 110 prisoners along with 8 machine guns.