The XV International Brigade fought for the Spanish Second Republic in the Spanish Civil War as a part of the International Brigades. It was a Mixed brigade (Brigada mixta) mustered at Albacete in Spain, in January 1937, comprising many English-speaking volunteers - arranged into a mostly British 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 El Ebro.