The 1973 Chilean coup d'état was a military overthrow of the democratic socialist president of Chile Salvador Allende and his Popular Unity coalition government. Allende, who has been described as the first Marxist to be democratically elected president in a Latin American liberal democracy, faced significant social unrest, political tension with the opposition-controlled National Congress of Chile, and economic warfare ordered by United States president Richard Nixon. On 11 September 1973, a group of military officers, led by General Augusto Pinochet, seized power in a coup, ending civilian rule.

On September 11, 1973, Salvador Allende, President of Chile, died by suicide from gunshot wounds during a coup d'état led by General Augusto Pinochet, commander-in-chief of the Chilean Army. After decades of suspicions that Allende might have been assassinated by the Chilean Armed Forces, a Chilean court authorized the exhumation and autopsy of Allende's remains.