(From the official NG website)
The Guard answers the call, at home or abroad.
The incredible versatility of the National Guard enables its troops to respond to domestic emergencies, combat missions, counterdrug efforts, reconstruction missions and more—all with equal speed, strength and efficiency.
Whether the call is coming from the state governor or directly from the president of the United States, Guard Soldiers are always ready and always there.
You'll serve your community, your state and your country.
As a Guard Soldier, you can expect your primary area of operation to be your home state, following the leadership of your state adjutant general and governor. This may include community efforts, responding to wildfires or floods. Or, it may include serving overseas, training foreign forces.
You will also be prepared to mobilize when directed by the president. This may include overseas service or domestic, such as serving along the U.S.-Mexico border.
So, what does the National Guard do? Whatever is needed, wherever it is needed.
http://www.nationalguard.com/guard-basics/what-is-the-national-guard-s-missionNow don't you just want to rush down and sign up?