On their return from the lectures, the Canadian Corps staff officers produced a tactical analysis of the Verdun battles and delivered a series of corps and divisional-level lectures to promote the primacy of artillery and stress the importance of harassing fire and company and platoon flexibility. The report of 1st Canadian Division commander Arthur Currie highlighted the lessons he believed the Canadian Corps could learn from the experiences of the French. The final plan for the assault on Vimy Ridge drew heavily on the experience and tactical analysis of the officers who attended the Verdun lectures. British First Army commander General Henry Horne approved the plan on 5 March 1917.