sure they can, they did during the civil war. what are you smoking?so you think we're not allowed to defend our country? what world you live in. LOLI would prefer a Marine Rifle company.
Let’s use our military to defend our own country for a change
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A little thing called the Posse Comitatus prevents that my friend.
For a police action? Yes.
For foreign invasion? No.
Nope. The military is forbidden to operate on American soil. Only an act by Congress would allow it.
Of course we are but not from illegals entering this country.
The military can't act on US soil. Posse Comitatus
However Border patrol and local LEO's can act.