At the same time, the acquisition of the Philippines triggered the development of a new U.S. policy in East Asia. When American businessmen saw the enormous potential of the Chinese market, European aggression in China threatened to end U.S. access. In 1899, Secretary of State John Hay proposed that countries interested in China “benefit from the perfect equality of treatment of shipping,” i.e. to maintain the principle of free trade or the “open door.” In 1900, Hay extended the open door policy to respect for China`s territorial and administrative integrity. President Roosevelt`s policy after 1939 was to pay particular attention to Latin America, to repel German influence, to build a single front in the name of the war effort, and then to gain the support of the United Nations. Only Brazil has contributed to the struggle of a considerable number of men.  The British secret services were aware of Roosevelt`s fears and exploited them in 1941 by producing a false map that indicated German plans to buy back South America.
 The appointment of the young Nelson Rockefeller to head the new well-funded office of Roosevelt`s Inter-American Affairs Coordinator provided strong leadership; In practice, Rockefeller reported Roosevelt and largely ignored the Department of Foreign Affairs.  Anti-fascist propaganda was a major project throughout Latin America and was run by Rockefeller`s office. There have been millions for radio shows and films, in the hope of reaching a wide audience. The techniques of Madison Avenue have generated a boost back to Mexico, especially where knowledgeable natives have withstood heavy American influence.  Yet Mexico was a valuable ally in the war. An agreement was reached under which 250,000 Mexican citizens living in the United States served in the U.S. forces; more than 1,000 were killed in action.  In addition to propaganda, large sums of money have been allocated to economic support and development. Overall, Roosevelt`s policy was a political success, except in Argentina, which tolerated German influence and refused to follow Washington`s leaders until the war was virtually over.   With the terrorist attacks of September 11, 2001, foreign policy objectives have returned to a leading role in defining the direction of U.S.
trade agreement policy. American politicians came to see the closed societies of the Middle East as hotbeds of terrorists, and the belief that democracies made the world a safer place has regained credibility. Trade agreements have been seen as a potential instrument to promote the rule of law and support U.S. partners in agreements that are developing economically and moving towards stronger democratic government. The Anderson Gual Treaty (officially: General Convention on Peace, Amity, Navigation and Trade) was a contract between the United States and Gran Colombia in 1824. It was the first bilateral agreement between the United States and another U.S. country. It officially began in 1947 with the Truman Doctrine, which theorized the “containment” policy, the Cold War had important consequences in Latin America. Latin America was considered by the United States as a complete part of the Western bloc called the “free world”, unlike the Eastern Bloc, a division born with the end of World War II and the Yalta Conference in February 1945. This is “U.S. policy,” Truman said, “supporting free peoples who oppose an attempt at submission by armed minorities or external pressure.” Truman raised $400 million to intervene in the Greek civil war, while the CIA (created by the National Security Act of 1947) took its first steps in Greece.