Complex sentence: In his firepower philosophy, Monash differed strongly with the BEF's Director of Training, Lieutenant General Sir Ivor Maxse, who held that 900 strong battalion "fire units" were essential.
Split into simpler sentences: In his firepower philosophy, Monash differed strongly with the BEF's Director of Training, Lieutenant General Sir Ivor Maxse. He held that 900 strong battalion "fire units" were essential.