Families of World War I soldiers whose remains were recently discovered in mass graves in northern France gathered on Monday for a dedication ceremony at the cemetery where the men have been reburied with full military honours. It marks the culmination of two years of painstaking research and excavation work which has shed light on the brief and brutal Battle of Fromelles on July 19-20, 1916, in which some 7,000 Allied troops died -- most of them Australian.Duration: 02:12