Hampartz Ovagam Ademian was born on 15 May 1891 in Bursa, Turkey but emigrated to the United States in 1913, arriving in New York onboard the ship ‘Chicago’ with his parents Ovagam Ademian and Mary Beelbeelian.
Despite still being a Turkish citizen he joined up as a private in the British Expeditionary Force, the part of the British Army which was sent to the Western Front during WW1. There are records of his serving between 1917 and 1919. Interestingly, he is registered as Armenian and his place of birth as Armenia in the list of US residents serving in the British Army. His profession is specified as chauffeur.
In December 1927 Hampartz applied for naturalisation from the USA. After 1936, he changed his name to Harry Adamnite.