How have we learned about soldiers firsthand experiences during the civil war?

a. through personal interviews
b. through coded messages
c. through letters written home
d. through the presidents speeches

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 decreasing neutrality of the u. s. in world war i

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