23-F
Milans del Bosch was the only senior army commander who supported the coup without reservation and conducted offensive operations of importance. On 23 February 1981, shortly after Antonio Tejero had stormed Congress, he ordered tanks onto the streets of Valencia and decreed a state of emergency.
After the televised message of king Juan Carlos I, those in the military who had not yet pronounced themselves decided to remain on the side of the government, causing the coup to fail. Despite the lack of support, Milans del Bosch only surrendered at 5 a.m. on the next day, 24 February.
Read more about this topic: Jaime Milans Del Bosch