History -- 20th century -- 1 Biography 1 Biography -- 1 Civil War -- 1 Civil War,1936-1939 -- 1 Fiction 1 more ... Fiction -- 1 Guerilla warfare -- 1 Journalists -- 1 Novelist, American -- 1 Participation, Foreign -- 1 Personal narratives -- 1 Priests -- 1 Spain -- 1 less ...