The challenge: Move millions of soldiers and tons of cargo halfway around the world and into the thick of action. How? Use the biggest ships, the widest planes, and the strongest trucks. Today, military planners move men and equipment further and faster than ever. The United Sates Transportation Command, answering to the Department of Defense, runs military transport like an efficient private shipping and travel agency. From the Civil War to US Transcom, we track the development of military logistics.