Complex sentence: Additionally, there was a divisional machine gun battalion, equipped with 64 Vickers machine guns in four companies of 16 guns each, and each brigade in the division had a mortar battery with eight Stokes Mortars.
Split into simpler sentences: Additionally, there was a divisional machine gun battalion, equipped with 64 Vickers machine guns in four companies of 16 guns. Each brigade in the division also had a mortar battery with eight Stokes Mortars.