South america
Mexico.
Argentina.
South Vietnam was already a sovereign nation by the time the US entered the nation. Its title was the "Republic of South Vietnam."
the north
Colombia
Mexico borders the US on the south and Canada on the north.
no Bolivia is an independent South American nation.
Communist nation. If the US/allies had won the war, the RVN (Republic of South Vietnam) would exist today as a "democratic nation." Just like SOUTH KOREA (ROK=Republic of South Korea) exists today as a "democratic nation." The US/UN won that war (Korean War 1950-1953). RVN=No longer exists (US/Allied defeat) ROK=Exists (US/UN Victory)
Not to the "nation" (country) of the US. But the North was attacking the South...and the US was determined to stop them.
Venezuela
NO! south Africa has a nation wide ban on US. electronics. if you are caught using them you WILL be fined and you WILL be put into prison!