There was a time when the United States thought it was superior to Latin America; some presidents believed that it was acceptable to become involved in the politics of certain countries, intervening...
It depends on the grammatical contex. At the beginning of a sentences or as the title of something it would be correct to write "The Americas," however in an essay or any situation where the phrase...
Columbus did not discover what we now know as the continental United States, but instead landed in the Caribbean. The term "America" came from a cartographer Amerigo Vespucci as he was the one who...