Probably Spain and Portugal because of Their colonies in Latin America
Latin America
prevent European intervention in Latin America
they used army forces to prevent them
European nations practiced a mercantilistic system in latin America
By 1830, several European nations had established colonies in Latin America, primarily Spain and Portugal, which were the dominant colonial powers. Spain controlled most of the region, while Portugal held Brazil. Other nations, such as Britain and France, had smaller territories and interests in the region but did not have significant colonies compared to Spain and Portugal. As a result, the primary colonial presence in Latin America at that time was largely Spanish and Portuguese.
The Monroe Doctrine asserted that European powers should not intervene in the political affairs of independent nations in the Americas. It essentially permitted the United States to act as a protector of countries in Latin America against European colonization and interference. This helped establish the United States as a dominant power in the region.
to prevent European countries from regaining colonies in Latin America
hepled European nations establish new western hemishere colonies
France (French Guiana), England (Cayman Islands) and the Netherlands (Aruba).
they killed the aztecs
Spain, Portugal, Holland and England