 I ANZAC Corps included the Australian 1st and 2nd Divisions and the New Zealand Division . The New Zealand Division was later transferred to the II ANZAC Corps in July 1916 and was replaced by the Australian 3rd Division in I ANZAC . Initially employed in Egypt as part of the defence of the Suez Canal , it was transferred to the Western Front in March 1916 . II ANZAC Corps included the Australian 4th and 5th Divisions , forming in Egypt it transferred to France in July 1916 . In November 1917 the five Australian divisions of I and II ANZAC Corps merged to become the Australian Corps , while the British and New Zealand elements in each corps became the British XXII Corps . The Australian Corps was the largest corps fielded by the British Empire in France , providing just over 10 percent of the manning of the BEF . At its peak it numbered 109 @,@ 881 men . Corps troops raised included the 13th Light Horse Regiment and three army artillery brigades . Each corps also included a cyclist battalion . 
