Strategic aspects -- Congresses 6 National security -- 4 Congresses -- 3 Foreign relations -- 2 Addresses, essays, lectures 1 Addresses, essays, lectures -- 1 more ... Dictionaries 1 Dictionaries -- 1 Economic conditions -- 1 Foreign economic relations -- 1 International status -- 1 Marine resources -- 1 Military relations -- 1 Petroleum industry and trade -- 1 Politics and government -- 1 Sea-power -- 1 less ...