Want this question answered?
Yes. Chief among them being TREASON.
No. Suppose you are a citizen of Venezuela and a U.S. citizen, living in USA. If unclesam attacks Venezuela because Chavez attacked an ally, Colombia, you would NOT be convicted of treason! However, suppose you acted as a spy for Chavez and FBI got you, then of course you could be tried and convicted for treason. I doubt that U.S. will ever intern U.S. citizens of foreign origins during a war, like the Japanese and German Americans during WWII.
If caught in the US and tried for treason, yes they get the death penalty because of the US constitution
Treason
High treason seriously threatens the security of your own country
Jonathon Dayton was arrested for treason in 1807. He was indicted but never tried.
the Constitution says , treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort.
because there were crimes and thiefs
John Brown
Treason Treason
Treason
double jeopardyAdded: In the US - such an occurrence can not happen. Double jeopardy is forbidden by the US Constitution.