- 25 April 1974
Officers overthrow the Caetano dictatorship. General Spinola appointed president.
- 1 May 1974
100,000 people march through Lisbon to celebrate May Day.
- 27-28 September 1974
Right plans coup. Spinola calls for demonstration of the “silent majority”. Workers build barricades and block bridges. Right wingers arrested. Spinola resigns.
- 11 March 1975
Right wing, led by Spinola, attempt coup by attacking left wing soldiers in Lisbon.
Workers besiege police barracks and surround the paratroopers attacking the soldiers, arguing with them. Coup peters out and Spinola flees to Brazil.
- Summer 1975
Huge demonstrations, a strike wave and revolt in the army.
- 25 November 1975
Right wing uses movements by left wing troops to launch an attack on the left in the army.
Resistance peters out and the attack is successful in defeating the left in the army. End of the revolution.