The son of a , Chauvel was commissioned as a second lieutenant in the Upper Clarence Light Horse, a unit organised by his father, in 1886. After the family moved to Queensland he was commissioned as a second lieutenant in the Queensland Mounted Infantry in 1890, and saw service during the 1891 Australian shearers' strike. He became a regular officer in 1896, and went to the United Kingdom as part of the Queensland contingent for the 1897 Diamond Jubilee of Queen Victoria. In 1899 he commanded one of two companies of Queensland Mounted Infantry that were Queensland's initial contribution to the Boer War. After the war, he was closely involved with the training of the Australian Light Horse.