It installed Change_of_leadership the military dictatorship Control of Carlos Castillo Armas , the first in a series of U.S.-backed authoritarian rulers in Guatemala .

The CIA armed Bearing_arms , funded Commerce_pay , and trained Education_teaching a force of 480 men led by Carlos Castillo Armas .

Castillo Armas ' force invaded Attack Guatemala on 18 June 1954 , backed Self_motion by a heavy campaign Military_operation of psychological warfare Hostile_encounter .

Castillo Armas became Becoming president ten days later , following negotiations Communication in San Salvador .

Castillo Armas quickly assumed Choosing dictatorial powers , banning Preventing_or_letting opposition parties , imprisoning Arrest and torturing Bodily_harm political opponents , and reversing Change the social reforms Reforming_a_system of the revolution .