In 1823, American President James Monroe issued the Monroe Doctrine, which basically was a warning to Europe to stay out of the western hemisphere. Although the Monroe Doctrine did, in fact, keep Europe at bay, it also opened the doors for American intervention in the business of its smaller neighbors.
French Intervention in Mexico:
After the disastrous “Reform War” of 1857 to 1861, Mexico could not afford to pay off its foreign debts. France, Britain and Spain all sent forces to collect, but some frantic negotiating resulted in the British and Spanish recalling their troops. The French, however, stayed, and captured Mexico City. The famous Battle of Puebla, remembered on May 5, took place at this time. The French found a nobleman, Maximilian of Austria, and made him Emperor of Mexico in 1863. In 1867, Mexican forces loyal to President Benito Juárez re-took the city and executed Maximilian.
The Roosevelt Corollary to the Monroe Doctrine:
Due in part to the French intervention and also to a German incursion into Venezuela in 1901-1902, US President Theodore Roosevelt took the Monroe doctrine one step further. Basically, he reiterated the warning to European powers to keep out, but also said that the United States would be responsible for all of Latin America. This often resulted in the United States sending troops to countries that could not afford to pay their debts, such as Cuba, Haiti, the Dominican Republic and Nicaragua, all of which were at least partially occupied by the US between 1906 and 1934.
Halting the Spread of Communism:
When fear of spreading communism gripped the United States after World War II, it would often intervene in Latin America in favor of conservative dictators. One famous example took place in Guatemala in 1954, when the CIA ousted leftist president Jacobo Arbenz from power for threatening to nationalize some lands held by the United Fruit Company, which was owned by Americans. The CIA would later attempt to assassinate Cuban communist leader Fidel Castro in addition to mounting the infamous Bay of Pigs invasion. There are many more examples, too numerous to list here.
Foreign Intervention in Latin America Today:
Times have changed, but foreign powers are still very active in meddling in the affairs of Latin America. France still owns a colony (French Guyana) on mainland South America and the United States and Britain still control islands in the Caribbean. The United States has sent forces to Haiti as recently as 2004 with the purpose of stabilizing the volatile nation after a contested election. Many people believe that the CIA is actively trying to undermine the government of Hugo Chávez in Venezuela: Chávez himself certainly thinks so.
Latin Americans resent being bullied by foreign powers: it is their defiance of the United States that has made folk heroes out of Chávez and Castro. Unless Latin America gains considerable economic, political and military might, however, things do not look to change much in the short term.