How did the iron curtain tighten the soviet union’s hold over eastern europe?

B. It allows the Soviet Union to isolate Central and Eastern Europe from the West

Explanation:

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:

d) the constitution rights of native americans and their right to self-government on reservations