Question: what was the longest lasting military engagement of ww2
Answer: The Battle of Verdun ( Bataille de Verdun , IPA : ( bataj də vɛʁdœ̃ ) , Schlacht um Verdun , IPA : ( ʃlaxt ˀʊm ˈvɛɐdœŋ ) ) , fought from 21 February to 18 December 1916 , was the largest and longest battle of the First World War on the Western Front between the German and French armies .