January 1 - President Fulgencio Batista fled to the Dominican Republic as the forces of Fidel Castro closed in. Before leaving, Batista named Judge Carlos Manuel Piedra as provisional president. Piedra ordered a cease-fire moments after taking office.[1] At 10:00 pm, the ships F.M. Robinson, Jack W. Wilke and the Peterson were directed to sail to Cuba to evacuate Americans if necessary.[2]
January 2 - As Castro's rebel forces rolled into Havana, the 32-year-old leader named Dr. Manuel Urrutia Lleo as President of Cuba.[3]
January 7 - Cuba's new government announced the first executions of former officials of Fulgencio Batista. Ten officers were executed at Santiago including Col. Arcadio Casillas, who oversaw Santiago.[4] The same day, the United States recognized the new Cuban government of Fidel Castro.[5]
January 8 - Fidel Castro was greeted by cheering crowds as he made a triumphant entry into Havana.[6]
January 12 - In the largest mass execution of former officials since Castro's victory, Cuban communists shot 71 supporters of Fulgencio Batista over a seven-hour period, then buried them in a mass grave.[7]