Canada forms the most northerly border of the U.S.
The country that forms most of the northern border of the United States is Canada. The country directly to the south is Mexico.
The country that forms most of the northern border of the United States is Canada. The country directly to the south is Mexico.
The answer will vary, depending what country you live in.
The answer will vary, depending what country you live in.
California is North of California's southern border, and Oregon is North of California's northern border.
Canada!
Germany
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The modern country that forms the southernmost border of the Roman Empire is Egypt.
The largest country in the world: Canada
The largest country in the world: Canada