During this period the United States instituted various measures to quiet popular unrest on the island. Stability was accomplished following the impeachment in 1936 of President Miguel Mariano Gómez by the senate, which was controlled by Fulgencio Batista. 

With the support of Batista, Federico Laredo Brú - the head of the Cuban army, unofficial dictator of Cuba and now the new president - began a program of social and economic reform. 

Batista won the presidential contest of 1940. In 1940, a new constitution helped to the lessen Cuba's political tension.

Military vehicles used in the Cuban Revolution