May 25 – President Héctor Cámpora is inaugurated, in the presence of Chilean PresidentSalvador Allende and Cuban PresidentOsvaldo Dorticós. An estimated million people gather on thePlaza de Mayo to welcome him.[1]
June 20 –Ezeiza massacre: Former presidentJuan Perón returns to Argentina. His plane has to be redirected to a military airport because of fighting between armed Peronist factions that have massed to greet his arrival at Buenos Aires's main airport. This event, known as theEzeiza massacre, left 13 dead and more than 300 injured.
July 13 – President Héctor Cámpora resigns from office to allow Juan Perón to return to power.
September 23 –Argentine general election, September 1973: The second general election is held, following the resignation of Vice PresidentVicente Solano Lima and Senate PresidentAlejandro Díaz Bialet. The runners-up in the March elections —Ricardo Balbín (UCR) andFrancisco Manrique (APF) — again accepted their respective parties' nominations, with Manrique obtaining the endorsement of thePDP and naming its leader as his running mate.[2]Juan Perón, with his wifeIsabel Perón as his running mate, win with a record landslide on the same FREJULI umbrella ticket on which Cámpora had been elected only six months earlier.[3]