The XV International Brigade was a mixed brigade (Brigada mixta) that fought for the Spanish Republic in the Spanish Civil War as a part of the International Brigades. Nicknamed Brigada Abraham Lincoln, it mustered at Albacete in Spain, in January 1937, comprising many English-speaking volunteers – arranged into a mostly British Battalion and a mostly North American Lincoln Battalion. It also included two non-English-speaking battalions, the Balkan Dimitrov Battalion and the Franco-Belgian Sixth February Battalion. It fought at Jarama, Brunete, Boadilla, Belchite, Fuentes de Ebro, Teruel and the Ebro River.