US Army: The official homepage of the United States Army
National Guard Home Page: Look here for role of National Guard and links to all the states.
U.S. Army Reserve Home Page: Look here for everything you ever wanted to know about the U.S. Army Reserves.
DefenseLINK: Department of Defense Link to all military branches
TRADOC: The Army's Training and Doctrine Command
Defense Finance and Accounting Service: Got a question about pay? This is the place to visit.