Complex sentence: Around 04:30, Turkish sentries opened fire on the boats, but the first ANZAC troops were ashore at Beach Z, soon became known as Anzac Cove.
Split into simpler sentences: Around 04:30, Turkish sentries opened fire on the boats, but the first ANZAC troops were ashore. Bean 1941, pp.252--254 Officially the landing was at Beach Z, but it soon became known as Anzac Cove.