Now is not mandatory.
Mexico was neutral.
No, it does not.
No.
true
true
boootyyyliciosb
In the US, there is no mandatory service requirement. You are, however, required to sign for the Selective Service Act when you turn 18, which makes you eligible for mandatory service, should the draft be reinstated. Some countries do have a mandatory military service requirement. See related link "Wkipedia.org - Military Service" for a listing of these countries.
Yes, they do have a manditory military serivice in Chile
How did the US go a isolationism foreign policy to a political and military involvement?
Question is unclear
war