Which military service was chiefly responsible for constructing the Alaska Canada Highway during World War 2?

The U.S. Army was primarily responsible for constructing the Alaska Canada Highway, also known as the Alcan Highway, during World War II. This monumental project began in 1942 as a response to the need for a strategic supply route to connect the contiguous United States to Alaska. The construction of the highway was critical for military logistics, facilitating troop movement and the transportation of supplies to defend against potential threats, particularly following Japan's attack on Pearl Harbor and their advancement into the Aleutian Islands.

The Army Corps of Engineers played a vital role in the highway's construction, utilizing their expertise in logistics and engineering to build a road through challenging and rugged terrain, encompassing vast wilderness and harsh weather conditions. The highway was completed in an impressively short time frame, reflecting the urgency of the war effort and showcasing the Army's capacity for large-scale engineering projects under pressure. This historical achievement has had lasting significance not only for military purposes but also for civilian transportation and development in Alaska.