In 1937, during and after the Battle of Jarama, captured Republican troops were held in Navalcarnero jail. Sixteen British International Brigade soldiers were interrogated, fingerprinted and had their heads shaved there before being paraded standing on the back of a truck guarded by members of the Guardia Civil and filmed by Movietone News. They were held, nine to a cell, for four days before transfer to a prison in Talavera de la Reina.