ANZAC or Anzac?

[Dianaa]

Sort of on the same subject, the original Aus and NZ troops landing at Gallipoli were the A NZ A C. Later in the war on the Western front when the Australian divisions together with the New Zealand Division they were called "II Anzac", while in 1917, without the NZ Division, all 5 Australian Divisions became the Australian Corps under General Monash.

I wonder if the early reference to Anzac was referring to the formation in France while the all capitalised ANZAC referred only to the formation in Gallipoli?