to build.
To construct buildings and maintain units, players need resources, and to get them need to build certain kinds of buildings. Thus it will be necessary to keep your base in constant equilibrium.
When you enter a conflict with another nation, you'll be able to deploy your units to the battlefield. In this situation, players won't be able to control their troops directly, but they can help divert enemy missiles.
World at Arms is a real-time strategy game with fairly simple gameplay that incorporates some elements from classic social games (like calling on your Facebook friends for help) into its war formula.