After World War II, the Soviet Union and the United States were the two most powerful countries left in the world. The Cold War was a period of tension between the two countries over ways of life. The two countries tried to get other countries on their side.
In 1846, the United States and Great Britain signed the Oregon Treaty. In this treaty, Oregon Country was split with the U.S. gaining sole possession of the territory south of the 49th parallel, and Great Britain gaining sole possession of the land to the north.10.In 1853, the United States sent diplomat James Gadsden to Mexico to renegotiate the border between the U.S. and Mexico.. From 1818 to 1846, the United States and Great Britain administered the territory in Oregon together. This was a compromise until both countries could agree on how to divide the land between them.
The US gives up Panama Canal. On September 7th, the United States and Panama signed a treaty revoking the treaty of 1903, which had granted the US control of the Panama Canal forever. The new treaty called the Panamanian control of the Canal by the year 2000. The continued American ownership of the Panama Canal resulted in growing protests in Panama, which were supported throughout South America. President Carter supported reaching a treaty with Panama to return control of the Canal. On September 7th, the United States and Panama, under the leadership of General Omar Torrijos, reached an accord that would return full control of the Canal to the Panamanians by the year 2000. Under the terms of the treaty the United States maintained the right to defend the Canal beyond that point.