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1493 - Voyager Christopher Columbus claims Puerto Rico for Spain.

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1493 - Voyager Christopher Columbus claims Puerto Rico for Spain.

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Puerto Rico was claimed by Christopher Columbus on November 19, 1493. That was his second voyage to claim land for the rulers of Spain. When Columbus discovered Puerto Rico he had many more ships and men with him then he had on his first voyage in 1492 when he first discovered America.

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The first Spanish settlement Capra was founded on 8 August 1508 by Juan Ponce de Leon a lieutenant under Columbus. He became the first governor of Puerto Rico. The next year the settlement was abandoned in favor for a nearby islet on the coast, named Puerto Rico.

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Puerto Rico is ceded by the Spanish to the US at the end of the Spanish American War.The Treaty of Paris came into effect on April 11 1899 when the documents of ratification were exchanged.The treaty also forced Spain to cede Guam and Puerto Rico to the United States.

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1917 - Jones Act grants US citizenship to Puerto Ricans

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1917 - Jones Act grants US citizenship to Puerto Ricans

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President Woodrow Wilson signed the Jones-Shafroth Act more commonly known as the Jones Act which made residents of Puerto Rico, a Spanish speaking U.S. possession American citizens. It replaced the Foraker Act of 1900 which established a civilian government on the island and was named after its chief sponsor Joseph Foraker

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1950 - October - President Truman signs the Puerto Rico Commonwealth Bill

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1950 - October - President Truman signs the Puerto Rico Commonwealth Bill

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Which enabled the island's people to establish their own constitution.
Nationalists oppose the new law and resort to violence. In November two US nationalists attempt to assassinate President Truman in Washington DC.

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1952 25 July  Puerto Rico's constitution is proclaimed

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1952 25 July  Puerto Rico's constitution is proclaimed

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Establishing a commonwealth with autonomy in internal affairs.Governor Luis Muñoz Marín proclaimed that the constitution was in effect. Law #1 of August 4 1952 of the Commonwealth of Puerto Rico establishes a full state holiday on July 25 of every year to be known as Puerto Rico Constitution Day.

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1954 - Nationalists open fire in the US House of Representatives

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1954 - Nationalists open fire in the US House of Representatives

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the Capitol Police held the Puerto Rican nationalists Lolita Lebanon, Rafael Miranda and Andres Cordero as they were taken into custody on March 1 1954 after a shooting from a House gallery. 5 people were injured.

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1985 - Landslide in Ponce kills 129 people

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1985 - Landslide in Ponce kills 129 people

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The 1985 Puerto Rico floods produced the deadliest single landslide  on record in North America.The floods were the result of a westward moving tropical wave that emerged off the coast of Africa on September 29.

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1993 - Spanish and English declared as official languages.

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1993 - Spanish and English declared as official languages.

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Unlike most schools in the United States public school instruction in Puerto Rico is conducted entirely in Spanish. English is taught as a second language and is a compulsory subject at all levels.The Puerto Rican Senate approved a bill Thursday declaring Spanish as the first official language of the country.

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2011 - President Barack Obama becomes first president since John F. Kennedy to make an official visit to Puerto Rico

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2011 - President Barack Obama becomes first president since John F. Kennedy to make an official visit to Puerto Rico

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President Barack Obama made a rare presidential visit to Puerto Rico Obama's trip was  the first official presidential visit to Puerto Rico in 50 year.The roughly 4 million residents of the U.S. Caribbean territory are American citizens but can't vote for president while the almost 5 million Puerto Ricans living in the U.S. states have full voting rights.