Which military branch was primarily responsible for building the Alaska Canada highway during World War II?

The U.S. Army was primarily responsible for building the Alaska Canada Highway during World War II. This massive construction project, which began in 1942, was crucial for establishing a land route that connected the contiguous United States to Alaska. The highway not only facilitated military supply lines but also helped ensure the defense of North America during a time when threats from Japan were looming, particularly after the attack on Pearl Harbor.

The Army Corps of Engineers led the efforts, demonstrating their capability in logistics, engineering, and infrastructure development under challenging conditions. This significant undertaking showcased the strategic importance of the highway for military mobilization and the overall war effort, emphasizing the Army's central role in national defense during that period.