ANZAC | Australian and New Zealand Army Corps. The soldiers in those forces quickly became known as Anzacs.

 The Australian and New Zealand Army Corps (ANZAC) was a First World War army corps of the Mediterranean Expeditionary Force.

The corps was formed in Egypt in December 1914, and operated during the Gallipoli campaign. General William Birdwood commanded the corps, which primarily consisted troops from the First Australian Imperial Force and 1st New Zealand Expeditionary Force, although there were also British and Indian units attached at times throughout the campaign.

The corps disbanded in 1916, following the Allied evacuation of the Gallipoli peninsula and the formation of I ANZAC Corps and II ANZAC Corps.

Following the evacuation of Gallipoli in December 1915, the Australian and New Zealand units reassembled in Egypt.

The New Zealand contingent expanded to form their own division; the New Zealand Division. The First Australian Imperial Force underwent a major reorganisation resulting in the formation of two new divisions; the 4th and 5th divisions (The Australian 3rd Division was forming in Australia and would be sent directly to England and then to France.)

These divisions were reformed into two corps: I ANZAC Corps and II ANZAC Corps.

I ANZAC Corps, under the command of General Birdwood, departed for France in early 1916.

II ANZAC Corps, commanded by Lieutenant General Alexander Godley, followed soon after.

In January 1916, the 4th (ANZAC) Battalion, Imperial Camel Corps, was formed with Australian and New Zealand troops. The 1st and 3rd Battalions were Australian, while the 2nd Battalion was British.

Later, in March 1916, the ANZAC Mounted Division with three Australian and one New Zealand brigade, was formed for service in Egypt and Palestine.