Complex sentence: Because the terrain created a bottleneck, delays at Chunuk Bair prevented early reinforcements, and the rifles were unloaded, the attacking Australians lost 372 casualties, or 40 per cent of the force while the Ottomans recorded only eight casualties.
Split into simpler sentences: Because the terrain created a bottleneck, delays at Chunuk Bair prevented early reinforcements. As the rifles were also unloaded, the attacking Australians lost 372 casualties, or 40 per cent of the force while the Ottomans recorded only eight casualties.