[1] Although initially meant for service in France, with the rest of the Kitchener New Armies, it was ordered to the Mediterranean as reinforcements for the Anglo-French expedition at Gallipoli.

[4] Initially in reserve to the main break-out from Anzac by units of the New Zealand and Australian Division, the 38th and 39th Brigades were sent in as reinforcements as the attack stalled.

[5] The 7th Gloucesters and the 8th Royal Welch Fusiliers were sent to support the Wellington battalion of the New Zealand Infantry Brigade when it made the decisive assault on Chunuk Bair on the morning of 8 August.

When the Ottomans counter-attacked on the morning of 10 August the 13th (Western) Division troops on Chunuk Bair and at The Farm, suffered many casualties.

To Maude fell the task of making sure that the 13th (Western) Division slipped away in the night during the evacuation of the Suvla Bay positions.

I got away all my guns and ammunition and we even destroyed the sandbags which we had to leave in the parapets by ripping them with bayonets or clasp knives to make them useless.

In a way I could not help feeling a little sorry that they did not find us out, for my division had two strongly prepared lines, each with an excellent field of fire to fall back upon, and if they had only come on we should have given them a real good dressing.

[11]After being evacuated from Suvla, the 13th (Western) Division was ordered in December to reinforce the British forces at Cape Helles.

As the division was preparing to fall back to the beaches, it was attacked by Ottoman units in the late afternoon and evening of 7 January 1916.

[20][21] The 13th (Western) Division brought with it modern, heavy artillery, including howitzers and as the strongest unit available, became the spearhead of the attempt by the Tigris Corps to relieve the Kut garrison, beginning on 6 April 1916.

After taking the first two places, the 13th (Western) Division was stopped by the Ottoman forces under the command of Khalil Pasha at the Battle of the Sanniyat on 9 April 1916.

On 9 April 1916, Chaplain William Addison, Private James Fynn and Lieutenant Edgar Myles were awarded the Victoria Cross for saving wounded soldiers.

[24] Taking the Bait Isa line exposed the flank of the Sanniyat position to enfilading artillery and machine-gun fire.

After a brief pause, the division drove north, crossing the Diyala River, and participated in the capture of Baghdad on 11 March 1917.