Complex sentence: Initially they were organised into I Anzac Corps and II Anzac Corps alongside the New Zealand Division, however, on 1 November 1917 the Australian divisions were re-grouped together to form the Australian Corps.
Split into simpler sentences: Initially they were organised into I Anzac Corps and II Anzac Corps alongside the New Zealand Division. On 1 November 1917 the Australian divisions were re-grouped together to form the Australian Corps.