Question

during world war i, the arrival of american troops boosted allied morale because they refused to join to battle at the meuse - argonne. provided more than one million reinforcements. taught allied troops how to build trenches. forced german troops to evacuate france and belgium.

Explanation:

During World War I, the arrival of American troops was significant. The Meuse - Argonne was a major battle where American troops did participate. Trenches were already a well - established part of WWI warfare before American troops arrived. The evacuation of German troops from France and Belgium was a result of a series of events and not directly because of the arrival of American troops. However, the large number of American reinforcements (over one million) provided a much - needed boost to the Allied forces in terms of manpower.

Answer:

provided more than one million reinforcements.