what were the causes which led to this clash?
To protect the First Army and the Third Army farther south from German enfilade fire, thus, the Canadian Corps were to capture the German-held high ground of Vimy Ridge
Battle of Vimy Ridge
The Canadian Corps were to capture the German-held high ground of Vimy Ridge, an escarpment on the northern flank of the Arras front. This would protect the First Army and the Third Army farther south from German enfilade fire. 
on what date did the battle of vimy ridge first begin? 9 April 1917 where exactly did it take place? Nord-Pas-de-Calais region of France whom was it fought between? The Canadian Corps and the German 6th Army what weapons were used to fight in this? 18 pounder field guns, 4.5 inch howitzers, 2 inch trench mortars can you name anyone warrior or commander from the first group mentioned above who fought in this? Brigadier-General Edward Morrison can you name anyone warrior or commander from the second group mentioned previously who fought in this? UNANSWERABLE
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Battle of Vimy Ridge [SEP] Introduction
The battle was the first occasion when the four divisions of the Canadian Expeditionary Force fought together and it was made a symbol of Canadian national achievement and sacrifice. A portion of the former battleground serves as a memorial park and site of the Canadian National Vimy Memorial.