The Capture of Regina Trench (Staufen Riegel) was a tactical incident in 1916 during the Battle of the Somme during the First World War. Regina Trench was the Canadian name for a German trench dug along the north-facing slope of a ridge running from north-west of the village of Le Sars, south-westwards to Stuff Redoubt (Staufenfeste), close to the German fortifications at Thiepval. It was the longest such German trench on the Western Front. Attacked several times by the Canadian Corps during the Battle of the Ancre Heights, the 5th Canadian Brigade of the 2nd Canadian Division briefly controlled a section of the trench on 1 October but was repulsed by counter-attacks of the German Marine Brigade (equivalent to an army division), which had been brought from the Belgian coast. On 8 October,