regina trench ( ) was a german trench dug along the north-facing slope of a ridge running from north-west of the village of le sars , unk to stuff redoubt ( ) , close to the german fortifications at thiepval on the somme battlefield .

on 21 october , the 4th canadian division attacked Attack the western portion of regina trench , as the 18th ( eastern ) division , 25th division and the 39th division of ii corps , attacked Attack the part further west ( known as stuff trench to the british ) .

trans-canada air lines flight 810 was a canadair north star on a scheduled flight from vancouver to calgary ( continuing to regina , winnipeg , and toronto ) .