where there any underground operations ?
Underground warfare had been conducted on the Vimy sector.
Battle of Vimy Ridge
Operations along the Vimy Ridge were accompanied by extensive underground excavations. The Arras–Vimy sector was conducive to tunnelling owing to the soft, porous yet extremely stable nature of the chalk underground. Underground warfare had been conducted on the Vimy sector since 1915.
who fought in the battle of vimy ridge The main combatants were the four divisions of the Canadian Corps in the First Army, against three divisions of the German 6th Army. when did this battle take place ? It took place from 9 to 12 April 1917. who won the battle ? Canadian Corps.
wiki:13486869
Battle of Vimy Ridge [SEP] Underground operations
Operations along the Vimy Ridge were accompanied by extensive underground excavations. The Arras–Vimy sector was conducive to tunnelling owing to the soft, porous yet extremely stable nature of the chalk underground. Underground warfare had been conducted on the Vimy sector since 1915. Bavarian engineers had blown twenty mines in the sector by March 1915. By early 1916, German miners had gained an advantage over their French counterparts. British tunnelling companies of the Royal Engineers took over progressively from the French between February and May 1916. On their arrival, the British began offensive mining against German miners, first stopping the German underground advance and then developing a defensive strategy that prevented the Germans from gaining a tactical advantage by mining.