That depends on a combination of things, including your current Military Occupational Specialty. Technically, it could be anywhere. Most likely, you'll attend drill at the armory nearest your hometown, and if called to action, remain in-state. However, in major emergencies, such as in Hurricane Katrina, you could be sent to another state to help. It's also possible you'll be deployed in support of combat operations, such as to the Middle East to assist in the War on Terrorism.