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| 1928, Jan.–Feb |
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| The sixth Pan-American conference met at Havana. The Pan-American Union was placed on a treaty basis, and various conferences arranged for matters of common interest. The U.S., however, opposed a resolution directed against intervention in the internal affairs of other states. | 1 |
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| 1928, Dec.–1929, Jan |
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| The Pan-American conference on conciliation and arbitration met in Washington, revised the treaty of May 3, 1924, declared for conciliation and arbitration of all disputes, and set up commissions to deal with cases as they should arise. | 2 |
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| 1930, Sept |
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| Meeting of the first Pan-American conference on agriculture in Washington. | 3 |
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| 1933 |
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| Seventh Pan-American conference, in Montevideo. Secretary of State Hull did his utmost to remove distrust of the U.S. and impress upon the American states the need for confidence and collaboration. | 4 |
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| 1936, Dec. 1–23 |
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| Pan-American conference (See 1933–36) for the maintenance of peace, in session at Buenos Aires. This conference marked the end of unilateral intervention by the U.S. in Latin America (Good Neighbor Policy). The American governments for the first time accepted the principle of consultation in case the peace of the continent should be threatened. A convention was drawn up to provide for a common policy of neutrality in the event of conflict between American states. | 5 |
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| 1938, Dec. 24 |
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| The Pan-American conference, meeting in Lima (21 states represented), adopted the Declaration of Lima, which reaffirmed the absolute sovereignty of the various American states, but also expressed their determination to defend themselves against “all foreign intervention or activities that may threaten them.” It provided further for consultation in case the “peace, security, or territorial integrity” of any state should be menaced. The declaration was a reflection of growing uneasiness, especially in the U.S., over possible designs of the European Fascist powers upon Latin American territory. | 6 |
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| 1939, Oct. 2 |
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| The Pan-American conference proclaimed a safety zone around the Western Hemisphere (See 1939, Oct. 2). | 7 |
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| 1942, Jan. 15 |
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| In Rio, the Pan-American conference discussed possible joint action against aggression. | 8 |
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| 1945, Feb. 21 |
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| The Inter-American conference, at a meeting in Mexico City (See 1945, Feb. 21–March 8), agreed to work out a general hemispheric defense treaty. | 9 |
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