Space is now 'most essential' domain for US military, Pentagon says 

 U.S. Deputy Secretary of Defense Kathleen Hicks said that, while China and Russia want to make space a 'warfighting domain,' the U.S. is committed to deterrence only. 

https://cdn.mos.cms.futurecdn.net/ZF5iF3vdkT3uWtkmVgioLZ.jpg

https://www.space.com/space-command-conflict-in-space-deterrence-kathleen-hicks