Spaniard Pedro de Mendoza founds Buenos Aires, Argentina.

Spanish conquistador Hernando de Lerma founds the settlement of Salta, Argentina.

Foundation of Rosario in Argentina.

Gervasio Antonio de Posadas joins Argentina's second triumvirate.

Gervasio Antonio de Posadas becomes Supreme Director of Argentina.

Argentina declares independence from Spain.

An army of 5,423 soldiers, led by General José de San Martín, crosses the Andes from Argentina to liberate Chile and then Peru.

The Argentinian San Martín crosses the Andes with an army in order to liberate Chile from Spanish rule.

An Argentine/Chilean patriotic army, after crossing the Andes, defeats Spanish troops on the Battle of Chacabuco.

Brazil marines unsuccessfully attack the temporary naval base of Carmen de Patagones, Argentina.

Uruguay is formally proclaimed independent at preliminary peace talks brokered by Great Britain between Brazil and Argentina during the Argentina-Brazil War.

The Empire of Brazil, Argentina and Uruguay sign the Treaty of the Triple Alliance

Welsh settlers arrive at Chubut in Argentina.

First telegraphic connection in Argentina.

Racing Club de Avellaneda, one of the big five of Argentina, is founded.

The United Kingdom sells a meteorological station on the South Orkney Islands to Argentina, the islands are subsequently claimed by the United Kingdom in 1908.

Buenos Aires,Argentina. The Buenos Aires Subway starts operating, it`s the first underground railway system in the southern hemisphere and in Latin America

Democratically elected Argentine president Hipólito Yrigoyen is deposed in a military coup.

A military coup in Argentina ousts Ramón Castillo.

Argentinian labour leader José Peter declares the ''Federación Obrera de la Industria de la Carne'' dissolved.

A massive number of people, headed by CGT and Evita, gather in the Plaza de Mayo in Argentina to demand Juan Peron's release. This is known to the Peronists as the ''Día de la lealtad'' (Loyalty Day). It's considered the founding day of Peronism.

Argentine military officer and politician Juan Perón marries actress Evita.

Soviet Union established diplomatic relations with Argentina.

Argentina becomes a signatory to the Buenos Aires copyright treaty.

The first Pan American Games are held in Buenos Aires, Argentina.

Juan Perón is deposed as the ruler of Argentina.

In Buenos Aires, Argentina, four Israeli Mossad agents capture fugitive Nazi Adolf Eichmann who is living under the alias of Ricardo Klement.

The Argentine comic strip Mafalda is published for the first time.

Argentina becomes a member of the Berne Convention copyright treaty.

Uruguayan Air Force Flight 571 crashes in the Andes mountains, near the border between Argentina and Chile. By December 23, 1972, only 16 out of 45 people lived long enough to be rescued.

Ezeiza massacre in Buenos Aires, Argentina. Snipers fire upon left-wing Peronists. At least 13 are killed and more than 300 are injured.

Juan Perón returns to power in Argentina.

Isabel Perón is sworn in as the first female President of Argentina. Her husband, President Juan Peron, had delegated responsibility due to weak health and died two days later.

In Argentina, the armed forces overthrow the constitutional government of President Isabel Perón and start a 7-year dictatorial period self-styled the ''National Reorganization Process''. Since 2006, a public holiday known as Day of Remembrance for Truth and Justice is held on this day.

Falklands War: Argentinian forces land on South Georgia Island, precipitating war with the United Kingdom.

Falklands War: Argentina invades the Falkland Islands.

The United Kingdom sends a naval task force to the south Atlantic to reclaim the disputed Falkland Islands from Argentina.

Falklands War: The British nuclear submarine HMS ''Conqueror'' sinks the Argentine cruiser ARA ''General Belgrano''.

Twenty sailors are killed when the British Type 42 destroyer HMS ''Sheffield'' (D80) is hit by an Argentinian Exocet missile during the Falklands War.

Falklands War: British forces defeat the Argentines at the Battle of Goose Green.