Cuba
To protect the independence of American states, the US would, if necessary, exercise its power as the policeman of the Western Hemisphere. In other words, Europe was to keep out of the affairs of South and North America, but the US would act, using military force if necessary, and intervene in nations south of our border if necessary to protect our interests.
In the second century it was the Roman force that was powerful both in their military strength and politically as well.
Military to Medicine New American Country in Tribute to the Military Wife - 2011 was released on: USA: 31 January 2011 (limited)
Kyrgyzstan.
Iran.
God and Country Untold Stories of the American Military - 2008 was released on: USA: 11 November 2008 (Virginia)
That depends on which century you are talking about. At the turn of the 21st century Americans were focused elsewhere. At the turn of the 20th century, Americans did have an interest in the Philippines, having just acquired them following victory in a spectacularly short war with Spain and being involved in military pacification of the nationalists there. At the turn of the 19th century, most American had no interest in the Philippines because the country was focused on expanding into the American continent.
NONE ---------------------- However, if you count Costa Rica as South American, then it does not have an army.
Mexico has.
it came from Greece in the late 5th century and was used as military headgear
The Mexican military at the time was poorly trained and equipped, facing a much more powerful and technologically advanced American military force. Despite their efforts, they were unable to successfully defend their country against the American invasion, leading to a humiliating defeat.