Yes, I’ve travelled. There was military with automatic weapons on display in Indonesia. Jamaica too. In Mexico too. I’ve never seen automatic weapons displayed in Europe or Canada. Actually, didn’t see any in Cuba. Oh, and armed guards are not the same as active duty military carrying fully automatic weapons.
I’ve been to the Vatican. I’m sure there are armed guards but they’re inconspicuous enough that I didn’t notice. Swiss guards with Ak47’s is not something I’d forget.