The plan divided the Canadian Corps advance into four coloured objective lines. The attack would be made on a front of , with its centre opposite the village of Vimy, to the east of the ridge. The first objective, represented by the Black Line, was to seize the German forward defensive line. The final objective of the northern flank was the Red Line: taking the highest point on the ridge, the fortified knoll known as the Pimple, the Folie Farm, the Zwischen-Stellung trench and the hamlet of Les Tilleuls. The southern two divisions were to achieve two additional objectives: the Blue Line encompassing the village of Thélus and the woods outside the village of Vimy and the Brown Line, which aimed at capturing the Zwölfer-Graben trench and the German second line. The infantry would proceed close behind a creeping barrage placed down by light field guns, advancing in timed increments. The medium and heavy howitzers would establish a series of standing barrages further ahead of the infantry against known defensive systems.