Underground movements World War, 1939-1945 96 History 59 War 20 Guerrillas 10 Politics and government 7 Secret service 7 more ... Women 7 Escapes 5 Holocaust, Jewish (1939-1945) 5 Politics and literature 5 Anti-Nazi movement 4 Collaborationists 4 Jews 4 Rescue 4 Underground literature 4 Aerial operations, American 3 Aerial operations, British 3 Air pilots, Military 3 Campaigns 3 Flight crews 3 Literature and the war 3 Motion pictures and the war 3 Pacifists 3 Prisoners and prisons, German 3 Prisoners of war 3 Refugees 3 Religion 3 Righteous Gentiles in the Holocaust 3 War and motion pictures 3 less ...