The National Army of Colombia (Spanish: Ejército Nacional de Colombia) is the land military force of the government of Colombia and the largest service of the Colombian Armed Forces. It has the responsibility for land-based military operations along with the Infanteria de Marina (Naval Infantry) to protect the Colombian state against domestic or foreign threats.

The modern Colombian Army has its roots in the Ejército de los Comuneros or Army of the Commoners which was formed on August 7, 1819, before the establishment of the present day Colombia to meet the demands of the Revolutionary War against the Spanish Empire.

That same day, the Congress of Angostura created the Greater Colombian Army after the triumph over the Spanish, to replace the disbanded Commoners Army. However, the Colombian Army considers itself to be an evolution of the Commoners Army, and thus dates its inception from its origins.

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