The 1943 Argentine coup d'état, also known as the Revolution of '43, was a coup d'état on 5 June 1943 that ended the government of Ramón Castillo, who had been fraudulently elected to the office of vice-president before succeeding to the presidency in 1942 as part of the period known as the Infamous Decade. The military was opposed to Governor Robustiano Patrón Costas, Castillo's hand-picked successor, a major landowner in Salta Province and a primary stockholder in the sugar industry. The only serious resistance to the military coup came from the Argentine Navy, which confronted the advancing army columns at the Navy Petty-Officers School of Mechanics.

It was the military government that "incubated" Peronism. The coup of June 5, 1944 is considered by some historians as the true date of the birth of the movement created by Juan Perón. Perón chose June 5 to take office to honor the 1944 coup, which established the only dictatorship that began and ended on the same date.