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.

The British Legion or British Legions were foreign volunteer units which fought under Simón Bolívar against Spain for the independence of Colombia, Venezuela, and Ecuador, and under José de San Martín for the independence of Peru, in the Spanish American wars of independence. Venezuelans generally called them the Albion Legion. They were composed of over seven thousand volunteers, mainly Napoleonic War veterans from Great Britain and Ireland, as well as some German veterans and some locals recruited after arriving in South America. Volunteers in the British Legion were motivated by a combination of both genuine political conviction and mercenary motives.