Selective Service System is evidence enough of the government's power to oblige participation in defence.... But if you're interested...
https://scholarship.law.cornell.edu/cgi/viewcontent.cgi?arti...
That link is specifically discussing actions the government takes in war. Like, a real, ongoing, war where it's accepted extraordinary actions may be necessary that conflict with peacetime rights to private property (it was written during World War 2).
Selective service activation, I.E. a draft. Requires an act of Congress. When did they enact a bill to draft Anthropic?