Complex sentence: On 12 October, the battle for Passchendaele commenced with the New Zealand Division's 2nd and 3rd Brigades attacking Belluvue Spur while the Australian 3rd Division attempted to take Passchendaele itself.
Split into simpler sentences: On 12 October, the battle for Passchendaele commenced. The New Zealanders were to attack Belluvue Spur, while the Australian 3rd Division attempted to take Passchendaele itself.