There are only five known Aboriginal servicemen buried at Gallipoli, however, it is estimated that 500-800 Aboriginal diggers served in the First World War. Ethnicity was not recorded in the enlistment process and research into indigenous service can involve trawling across many different sources, sometimes we may never know who these servicemen were.
Garth O'Connell, a fellow member of the battlefield tour, has been researching Aboriginal service. Garth works at the Australian War Memorial and in his spare time created a website that includes information on researching Aboriginal Servicemen. On the tour he took a few moments out to give an interview with Channel Seven about his research: You can view Garth's interview here.