Causes 3 World War, 1939-1945 3 Aeronautics, Commercial--Law and legislation--United States 1 Airports--Pennsylvania 1 Ambassadors--United States 1 Ambassadors’ spouses 1 Ancient Arabic Order of the Nobles of the Mystic Shrine for North America 1 more ... Armories--Pennsylvania 1 Democratic Party (U.S.) 1 Diplomatic and consular service, American 1 Foreign Relations--United States--Europe--1935-1944 1 Governments in exile 1 Nazi propaganda--Poland 1 Pearl Harbor (Hawaii), Attack on, 1941 1 Poland--Foreign relations--United States--Sources 1 Politics and government 1 United States Army 1 United States--Foreign relations--Poland--Sources 1 United States--Foreign relations--Spain--Sources 1 United States--History--Cold War 1 World War I. 1 World War II 1 World War II, 1939-1945--Diplomatic Service 1 World War, 1939-1945--Causes 1 Yalta Conference (1945) 1 less ...