Mount Gambier Aboriginal WWI veterans receive memorials as part of The Headstone Project initiative

Ken Jones stands beside the new grave of his uncle John Westbury at Lake Terrace Cemetery in Mount Gambier. (ABC South East SA: Sam Bradbrook)

Two half-brothers who fought in the First World War now have a permanent recognition of their life and service, more than a century after they returned home.

John Brett and John Westbury, both Boandik men from South Australia's Limestone Coast, enlisted four days apart in 1916 and joined the fighting on the Western Front.