Robert Thompson was born in Cookstown, County Tyrone and was the son of Thomas and Mathilda Thompson of Dundonald, Belfast. He enlisted with the Machine Gun Corps in Downpatrick. He was seriously wounded on the first day of the Somme offensive and was taken to a field ambulance at Warloy Baillon. His injuries were critical and he died the following day.
Warloy-Baillon is a village about 21 kilometres north-east of Amiens along the D919 to Arras. The Communal Cemetery is on the east side of the village and the extension is on the eastern side of the cemetery.