The answer is Canal. Canals are human-made channels for water movement, or to administration water transport vehicles. In the vernacular, both are alluded to as 'trenches', and as a rule, the built works will have a progression of dams and bolts that make territories of the low-speed current stream. These territories are alluded to as 'slack water levels', frequently just called 'levels'.
Answer:
In 1917 almost two million American soldiers arrived in Europe. These additional troops bolstered the European Allied forces and hurt the morale of German troops. The deployment of these American troops helped break holes in the German lines, and eventually the German's retreat. These additional troops provided the necessary manpower to help end the war
