Fall of the dictatorship of Miguel Primo de Rivera
The fall of the dictatorship of Miguel Primo de Rivera took place on January 28, 1930, when General Miguel Primo de Rivera was forced to present his resignation to the King of Spain, Alfonso XIII, which he accepted, giving way to the Dictablanda of Dámaso Berenguer. The end of the dictatorship was the culmination of a process that began several months earlier.
Source: Wikipedia — Fall of the dictatorship of Miguel Primo de Rivera (CC BY-SA 4.0)