I prefer that hostiles not even contemplate invading America and the best way to do that is to keep our troops close by to those who might consider doing America harm.
Ummm, things have changed substantially from that time. I hope you are able to stragegize from current circumstances. -- Since then, the Monroe Doctrine has served us well ... --
The Monroe Doctine involved a geographic limitation. We have NOT been following it.
-- I prefer that hostiles not even contemplate invading America ... --
Me too, but they are here. My strategy involved massive destructive deterrant (nukes), and a "FU" attitude among a fighting populace.
-- the best way to do that is to keep our troops [away from the country] --
I disagree, moneyspender.