The British Legions were units that fought under Simón Bolívar against Spain for the independence of Colombia, Venezuela, Ecuador, and Peru. Venezuelans called them the Albion Legion. They were composed of over seven thousand volunteers, mainly Napoleonic War veterans from Great Britain and Ireland. Volunteers in the British Legion were motivated by a combination of both genuine political and mercenary motives. The most famous cause of emigration was the Great Famine of the late 1840s. A million are thought to have emigrated to Liverpool as a result of the famine. For both the Irish in Ireland and those in the resulting diaspora, the famine entered folk memory and became a rallying point for various nationalist movements.