How is the National Guard different from the Army Reserve?

Both Guard Soldiers and Army Reserve Soldiers train one weekend per month and two weeks every summer. Both Guard Soldiers and Army Reserve Soldiers can be called into full-time service to support Army combat missions. The main difference is that Guard Soldiers serve a dual mission. They can be called on by their state governor or the federal government. Reserve Soldiers do not have a state mission and cannot be called to respond to floods and hurricanes, for example.