Notes:
Doullens is a town in the Department of the Somme, approximately 30 kilometres north of Amiens on the N25 road to Arras. The citadelle, overlooking the town from the south, was a French military hospital, and the railhead was used by both armies. In March 1916, Commonwealth forces succeeded the French on the Arras front and the 19th Casualty Clearing Station came to Doullens, followed by the 41st, the 35th and the 11th. By the end of 1916, these had given way to the 3rd Canadian Stationary Hospital (which stayed until June 1918) and the 2/1st Northumbrian Casualty Clearing Station.

From February 1916 to April 1918, these medical units continued to bury in the French extension (No 1) of the communal cemetery. In March and April 1918 the German advance and the desperate fighting on this front threw a severe strain on the Canadian Stationary Hospital. The extension was filled, and a second extension begun on the opposite side of the communal cemetery.

The COMMUNAL CEMETERY EXTENSION No 1 contains 1,335 Commonwealth burials of the First World War. There are also seven French and 13 German war graves from this period.