Castro's forces were organized into various "frentes" or "fronts" scattered throughout Cuba with the majority operating in eastern Cuba. Each front were made up with various "columnas" or "columns" that were considered as small regiments or more appropriately as battalions. These units are as follows:

COMANDANCIA GENERAL DE LA REVOLUCION, PRIMER FRENTE (FIRST FRONT)

Commander-in-Chief: Fidel Castro Ruz

Columnas
No. 1 "José Martí"
No. 7 "Regimiento Caracas"

SEGUNDO FRENTE (SECOND FRONT) ORIENTAL FRANK PAIS

Commander: Comandante Raul Castro Ruz

Columnas
No. 6 "Juan Manuel Ameijeiras"
No. 16 "Enrique Hart"
No. 17 "Abel Santamaria"
No. 18 "Antonio López"
No. 19 "José Tey"
No. 20 "Gustavo Fraga"

TERCER FRENTE (THIRD FRONT) SANTIAGO DE CUBA

Commander: Comandante Juan Almeida Bosque

Columnas
No. 3 "Mario Muñoz"
No. 9 "Antonio Guiteras"
No. 10 "René Ramos Latour"

CUATRO FRENTE SIMON BOLIVAR

Commander: Comandante Delio Gomez Ochoa

Columnas
No. 12 "Simón Bolivar"
No. 14 "Juan Manuel Márquez"
No. 32 "José Antonio Echevarria"

FRENTE DE LAS VILLAS, PARTE SUR Y CENTRO

Commander: Comandante Ernest "Ché" Guevara de la Serna

Columnas
No. 8 "Ciro Redondo"
"Directorio Revolucionario 13 de Marzo"

PARTE NORTE

Commander: Comandante Camilo Cienfuegos Gorriaran
Columna No. 2 "Antonio Maceo"

FRENTE DE PINAR DEL RIO

Commander: Comandante Dermido Escalona Alonso
"Columna Hermanos Saiz"

Distinctive Unit Insignias of Fidel Castro's Rebel Army 1953-1961