Link
http://www.americasarmy.com/
It is the link of America’s Army homepage. There are detailed to introduce this game and also have software demos for people to download

http://en.wikipedia.org/wiki/America%27s_army
There is much useful information about the game. The website has detail introduce the background story and provided many extra information for example, the player and public comment of AA

http://www.casos.cs.cmu.edu/projects/americas_army/
This website is develop by center for computational analysis of social and organizational system , there are comprehensive analyzing how America’s Army contributed to build up the team spirit and it posted few publication which is published by this center. It seems much information and had the deep research of this game.

http://pc.ign.com/objects/482/482289.html
This website has the photo album and forum about America's Army. It have may tip for playing game .

http://www.goarmy.com/aarmy/index.jsp
The homepage of this website encouraged people to be soldier. This website introduced America's Army to show that there are close relationship of the game and US Army.