"Control" of space isn't a big deal as long as nations respect the no weapons treaty. Afaik it is possible for ground-based weapons to destroy satellites too. I

"Control" of space isn't a big deal as long as nations respect the no weapons treaty. Afaik it is possible for ground-based weapons to destroy satellites too. I guess a satellite that could find submarines or hidden nuke sites would be useful in peacetime, if you were planning a first strike.