Charles was educated at Glongowes Wood College and the Carmichael School, Dublin, and obtained the diplomas of the Irish Royal Colleges in 1888. He joined the Army Medical Services as surgeon on 31st January 1891, and served in Burma in 1893, being present at operations in the Kachin Hills, for which he received a medal with clasp. In 1897-8 he served in the North-West Frontier of India, taking part in the Malakand expedition and the action at Landakai, receiving a meal with clasp. In 1898-9 he took part in the Karene expedition in Sierra Leone, and was mentioned in despatches [LG 29/12/1899] and received a medal with clasp. In the following year he served in the South African war as a special service officer, taking part in operations in Natal and being present at the relief of Ladysmith, where he was severely wounded. He was also engaged in operations in the Orange Free State during 1900, including actions at Houtnek, Vet River and Zand River; and in Cape Colony, south of Orange River. He was mentioned in despatches, and received the Queen's medal with three clasps. He gained the rank of Major on 31st January 1903 and Lieutenant Colonel on 7th May 1913. Before the outbreak of war he was stationed at Dublin, holding the post of Deputy Assistant Director of Medical Service. He entered the war in France with the Expeditionary Force in August 1914, in charge of No 1 General Hospital. On the 8th September he replaced Col H Thompson as A.D.M.S. of the 2nd Division, when Col Thompson was captured at Prisches on the 26th August 1914. Charles was severely wounded himself as a high-explosive shell burst near him when he was carrying wounded into Verneuil Chateau. Eye witness accounts say that immediately after receiving his wounds, he was further injured by a gun limber. He was moved due to the constant shelling but later died in L'Opital Farm, Advanced Dressing Station from a shell splinter to his back. He was the second son of the late John Edward and Katherine M Dalton of Ballygriffin, Co. Tipperary.