The world’s nations are looking for any advantage in the increasingly contested area of space. Now, an effort is underway to change how the U.S. military is structured to handle space-related missions.

That solution would take current Air National Guard units — nine of them, in six different states — and move them to the U.S. Space Force. The proposal is not without controversy.

The National Guard Association of the United States argues that moving the Air National Guard units not only circumvents the authority of the state governors that oversee them but could also set a precedent for it to happen with other guard units.