Francisco de Paula Santander in the context of Neogranadine

The Battle of Boyacá (1819), also known as the Battle of Boyacá Bridge was a decisive victory by a combined army of Venezuelan and New Granadan troops along with a British Legion led by General Simon Bolivar over the III Division of the Spanish Expeditionary Army of Costa Firme commanded by Spanish Colonel José Barreiro. This victory ensured the success of Bolívar's campaign to liberate New Granada. The battle of Boyaca is considered the beginning of the independence of the north of South America, and is considered important because it led to the victories of the battle of Carabobo in Venezuela, Pichincha in Ecuador, and Junín and Ayacucho in Peru. New Granada acquired its definitive independence from the Spanish Monarchy, although fighting with royalist forces would continue for years.

Under the overall command of General Simon Bolivar, the Brigadier Generals Francisco de Paula Santander and José Antonio Anzoátegui led a combined patriot army of Neogranadines and Venezuelans that defeated in two hours the Spanish Royalist forces led by Spanish Colonels José María Barreiro and Francisco Jiménez who would both be captured in battle. The effective destruction of the Royalist Army led to the collapse of the Royalist Government in the capital of Santa Fe with Viceroy Juan de Samano along with other government officials fleeing the capital shortly after news had reached of the battle. The battle led to the liberation of much of central New Granada and would lead to the union between New Granada and Venezuela creating the Republic of Colombia (Gran Colombia) in December of that same year.

Bolívar's campaign to liberate New Granada, also known as the Liberation Campaign of 1819, was part of the Colombian and Venezuelan wars of independence and was one of the many military campaigns fought by Simón Bolívar. In 1819 Bolívar led a combined New Granadan and Venezuelan Army in a campaign to liberate New Granada which had been under Spanish control since 1816.

Bolívar marched his army through the flooded plains from Venezuela and entered the Casanare Province with his army in June 1819, combining his forces with those of Francisco de Paula Santander at Tame, Arauca, on 11 June. The combined Patriot force reached the Eastern Range of the Andes on 22 June and began a grueling crossing. On 6 July, the Patriots descended from the Andes arriving at Socha and into the valleys of central New Granada. After a brief convalescence, the Patriots fought a series of battles against the III Division of the Royalist army of Spanish colonel José María Barreiro Manjón, with the campaign culminating at the decisive Battle of Boyacá, where Bolivar's forces routed and dismantled the Royalist Army entering Santa Fe de Bogotá triumphantly 3 days later.