Diplomatic history -- World War -- 5 Foreign relations -- 2 Peace -- 2 Causes -- 1 Congresses -- 1 Dictionaries 1 more ... History -- 1 Peace of Westphalia (1648) -- 1 Prisoners and prisons -- 1 Prisoners of war -- 1 Sources -- 1 Thirty Years' War, 1618-1648 -- 1 less ...