Both military and civilian units supported the 93rd and 340th Engineers. They supplied food and clothing, heavy equipment and reconnaissance, transportation over bodies of water and radio communication. Coordinating the efforts of military and civilian specialists in supply, topography, pontoon bridging, and communications was complex. Throw in stevedores, doctors and nurses, bush pilots, and native guides and it is understandable that the most important support activity of all was provided by the government liquor store in Whitehorse.