After the outbreak of the First World War, Daly became Deputy Assistant Quartermaster-General of the IV Corps in October 1914.The London Gazette, 20 November 1914 http://www.london-gazette.co.uk/issues/28981/pages/9541/page.pdf He was assistant adjutant and quartermaster general of the 7th Division between 1914 and 1915. He was promoted to lieutenant-colonel in 1915,The London Gazette, 18 February 1915 https://www.thegazette.co.uk/London/issue/29074/supplement/1686/data.pdf was given his first brigade command, the 6th Brigade, the same year.S. Robbins, British Generalship During the Great War: The Military Career of Sir Henry Horne (1861–1929) (Ashgate Publishing, Ltd., 2010), 82. He then commanded the 33rd Infantry Brigade between February and September 1917,A. Turner, Messines 1917: The Zenith of Siege Warfare (Osprey Publishing, 2010), 34. when he was made commander of the 24th Division.Sir Douglas Haig's Despatch on the German spring offensive (Despatch No.6), http://www.1914-1918.net/haigs_michael_despatch.html He held this post until the division was disbanded in 1919. Daly was made a Companion of the Order of the Bath in 1918 and a Companion of the Order of St Michael and St George in 1919. He was Inspector-General and Military Advisor to Minister of Defence in Iraq between 1925 and 1927, and retired from the army in 1928.
