The 29th Brigade was formed in August 1914 as part of the 10th (Irish) Division, of the first wave of Kitchener's Army (K1). The division and brigade transferred to Lemnos in July 1915 in preparation for the Gallipoli landings. The 29th Infantry Brigade landed at Anzac Cove on August 6/7 of the same year, participating in the Battle of Chunuk Bair. The 10th (Irish) Division was withdrawn from Gallipoli to Salonika at the end of September 1915, elements of the division participating in actions at Karajakois, Yenikoi and Kosturino. In early September 1917, the Division was withdrawn to Egypt and took part in the Palestine Campaign where it fought in the third Battle of Gaza. The division moved back to Cairo at the end of the war.