Western Bloc of the FARC-EP
The Western Bloc of the Revolutionary Armed Forces of Colombia was the smallest of the organization blocs in size, although not in military capability. It was routinely held responsible for attacks that occurred in Cali and its surroundings. The specific divisions of the group are arguable. Some of its divisions or 'fronts', as they were commonly called, are shown below. Many of these fronts sometimes worked together towards a certain mission, while others were further divided into 'columns' and 'companies' with a smaller number of members. For more general information, see FARC-EP Chain of Command.
Commanders
6th Front
Also known as the Hernando González Acosta Front, it was composed of 400 to 500 people as of 2011. It operated mostly in the Cauca and Valle del Cauca Departments.| Alias | Name | Note |
| Sargento Pascuas, "Humberto" | Miguel Ángel Pascuas | One of the founders of the guerrilla in 1964, Front commander. |
| Rubén | Operational commander | |
| El Zorro | Oscar Ivan Gugu | One of the 'leaders' of FARC's 6th Front. Captured in January 2012. |
On September 19, 2008, heavy fighting occurred between the Colombian army and the FARC's sixth front during an attack on Toribío, Cauca Department. On April 27, 2013, 17 members of the front were captured while they attempted to steal a helicopter from the Colombian armed forces.
Mobile Column Alonso Cortés
The Mobile Column Alonso Cortés, composed of up to 50 men, operated in the same area as the 6th Front.| Alias | Name | Note |
| El Mocho | Ricardo Morales | Second in charge of the Mobile Column Alonso Cortés. Arrested in February 2011 |
| "El Paisa" or "William" | Carlos Mario Cardona León | Captured in April 2011. |
8th Front
It was composed by up to 80 men, and operated mostly in the Cauca Department and along the Pacific coast.| Alias | Name | Note |
| Ramírez | N/A | Killed in 2006, apparently by ELN. |
| Yesid | Arlex Porras Gómez | Captured in 2006. |
| "El Rojo" | Captured in 2003. |
29th Front
It was composed by up to 250 men and operated mostly in the Nariño Department. It included the mobile column Daniel Aldana which operated in the Tumaco area. In late April 2013, 13 alleged members of the column were captured.| Alias | Name | Note |
| Aldemar, Jhon Jairo | ||
| Anuar | Orlando Cardozo | Captured in 2005. |
| Camilo, Ricardo | Jairo Cuarán Collazos | Abandoned FARC in 2003 and found exile in Chile. |
30th Front
Also known as the José Antonio Páez Front, it was composed of up to 300 people. It operated mostly in the Cauca and Valle del Cauca Departments. The front led drug trafficking activities in the areas near the Yurumangui river and was responsible for multiple attacks against civilians on Colombia's Pacific coast. On March 2011, 10 guerillas were killed by the army, and 5 others captured. On October 2, 2011, 3 guerillas were killed and 2 captured. On February 11, the 30th front attacked an army base, killing 3 and injuring 18 member of the Colombian army.| Alias | Name | Note |
| Mincho | Jorge Neftali Umenza Velasco, or Herminsul de Jesús Velasco | 1st commander. Killed in a bombardment in October 20, 2011 |
| Jefferson | Jaime Renteria Mosquera | Commander of a special unit of the 30th Front. Demobilized in December 2011 with 9 others guerrillas of the 30th Front |
| Freddy | Luis Eduardo Prada González |
Mobile column Miller Perdomo forms a part of this front.
60th Front
It was composed of up to 60 men and operated mostly in the Cauca Department.| Alias | Name | Note |
| "El Grillo" | Gilberto Arroyabe | |
| "Arturo" | N/A | Killed in 2006. |
Mobile Column Jacobo Arenas
It was composed by up to 300 men and operated mostly in the Cauca Department. The column is suspected to be responsible for an attack which killed six soldiers on February 9, 2009.| Alias | Name | Note |
| Caliche, Floresmiro Acosta | Carlos Patiño killed in 2013 | |
| 'Eladio' | Killed in 2009 | |
| Kinkón | Carlos Duval Ilipio Dizú | Captured in 2006. |
Mobile Column Arturo Ruiz
It was one of the FARC's elite units, among its most notorious operations is the kidnapping of the Valle del Cauca deputies on April 11, 2002.Mobile Column Gabriel Galvis
Operated in Valle del Cauca. It had 110 fighters or more as of 2011.Mobile Column Víctor Saavedra
Operates in Valle del Cauca and, especially, in the mountains east of Tuluá.Urban Front Manuel Cepeda Vargas
It was composed by up to 50 men and was one of the FARC's strongest factions in Cali.| Alias | Name | Note |
| El Enano | Chief of militias in Cali | |
| Narices | Iván Cárdenas Carrillo | Killed in 2010 |
| Santiago | Gustavo Arbeláez Cardona | Arrested in 2008. |
| J.J. | Milton Sierra Gómez | Killed in 2007. |
| Farid, Rafael | Gabriel Antonio Carvajal | Captured in 2005. |
| "Miller Chacón" or "El Médico" | KIA in May 2011. |