Canada forms the most northerly border of the U.S.
California is North of California's southern border, and Oregon is North of California's northern border.
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.
Canada!
Germany
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The southernmost border was the one between southern Egypt ad Numidia
The largest country in the world: Canada
The largest country in the world: Canada