Ohio Rev. Code § 5921.12: Federal military service.

Sections 5921.01 to 5921.16 of the Revised Code do not authorize the Ohio naval militia, or any part thereof, to be called or ordered as such into the military service of the United States. The naval militia may become a component of the Ohio national guard. The governor may consent to the employment of not more than one-half of the naval militia to assist in areas adjacent to the borders of the state. No person shall, by reason of his enlistment, warrant or commission in the naval militia, be exempt from militia service under any law of the United States.