Mich. Comp. Laws § 32.509: State military establishment; composition; organized and unorganized militia.

Sec. 109.

The organized militia of this state taken collectively shall be known as the state military establishment and constitutes the armed forces of this state. The organized militia consists of the army national guard, the air national guard, and the defense force when actually in existence as provided in this act. The unorganized militia consists of all other able-bodied citizens of this state and all other able-bodied citizens who are residents of this state who have or shall have declared their intention to become citizens of the United States, who shall be age 17 or over and not more than age 60, and shall be subject to state military duty as provided in this act.