1725 Foundation of Rosario in Argentina.
1813 Gervasio Antonio de Posadas joins Argentina's second triumvirate.
1814 Gervasio Antonio de Posadas becomes Supreme Director of Argentina.
1875 First telegraphic connection in Argentina.
1903 Racing Club de Avellaneda, one of the big five of Argentina, is founded.
1943 A military coup in Argentina ousts Ramón Castillo.
1945 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.
1946 Soviet Union established diplomatic relations with Argentina.
1955 Juan Perón is deposed as the ruler of Argentina.
1973 Juan Perón returns to power in Argentina.
1976 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.
1983 The first democratic elections in Argentina after seven years of military rule are held.
1983 Dissolution of the Military Junta in Argentina.
2002 Argentina defaults on an $805 million World Bank payment.
2005 Argentina's president Néstor Kirchner announces the early repayment of its external debt to the IMF.
2007 Airport police officer María del Luján Telpuk discovers a suitcase containing the undeclared sum of US$800,000 as it goes through an x-ray machine in Aeroparque Jorge Newbery in Buenos Aires, sparking an international scandal involving Venezuela and Argentina known as "Maletinazo".
2007 Cristina Fernandez de Kirchner becomes the first woman elected President of Argentina.