There's nothing conservative about an 800 billion dollar a year military budget. Our police would be enough to overpower most of the things we consider threats to us. Also 1 in 4 Americans own a firearm. The Japanese knew.
"You cannot invade the mainland United States. There would be a rifle behind every blade of grass." -Isoroku Yamamoto
We should be focusing inward. Why is it our job to protect the world from itself, and who thinks we even have the capability to do that?