VimyRidge 1917

The Battle of Vimy Ridge was part of the Battle of Arras, in the Nord-Pas-de-Calais region of France, during WW1
The main combatants were the 4 divisions of the Canadian Corps in the 1st Army, against 3 divisions of the German 6th Army.
The battle took place from 9 to 12 April 1917 at the beginning of the Battle of Arras, the first attack of the Nivelle Offensive,
which was intended to attract German reserves from the French, before their attempt at a decisive offensive on the Aisne
and the Chemin des Dames ridge further south.
Battle of Vimy Ridge. Wikipedia
The Free Encyclopedia. September 28, 2022

The Canadian Corps was 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
Supported by a creeping barrage, the Canadian Corps captured
most of the ridge during the 1st day of the attack. The village of Thélus fell during the 2nd day,
as did the crest of the ridge, once the Canadian Corps overran a
salient against considerable German resistance. The final objective, a fortified knoll located outside the village
of Givenchy-en-Gohelle, fell to the Canadians on 12 April.
The 6th Army then retreated to the Oppy–Méricourt line.