Politics and government -- Foreign relations -- 4 History -- 3 German reunification question (1949-1990) 2 Relations -- 2 Communism -- 1 Congresses -- 1 more ... Economic integration 1 Influence 1 National security -- 1 Reconstruction (1914-1939) 1 Unification -- 1 World War, 1914-1918 -- 1 World war, 1914-1918 -- 1 less ...