Which countries did the allies invade during D-Day

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

the hereditary right of a monarch to rule from the mandate of heaven

answer; i believe the above statement is (true);

the answer would be logic.