Mexico - The United States borders it to the North, and Guatemala borders it to the South.
Montana borders North Dakota and South Dakota to the east, Wyoming to the south, and Idaho to the west and southwest. To the north Montana borders Canadian provinces British Columbia, Alberta, and Saskatchewan.
Nigeria
South Korea is a peninsula, so only the sea borders Korea to the south.
The US helped South Vietnam with the South's blessing; the North was deciding if they should fight just the Southerners, or the US too. In the end, the North fought them both.
Mexico borders to the south of the United States.
Canada borders the US to the north, while Mexico borders the US to the south.
Mexico is the only country which borders the US to the south & Canada borders to the North.
Canada borders the north, Mexico borders the south.
Mexico borders the US on the south and Canada on the north.
Mexico is the closest country south of the US, as it borders the US to the south.
Mexico
Mexico.
mexico
of the US, Mexico
There's the Pacific Ocean, the Atlantic Ocean, and the Gulf of Mexico.
Mexico borders the US to the south.