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.
1. You may remember that the United States and Great Britain had a minor spat in 1776, which shall we say, did not put them on the friendliest of terms. In 1812, while Britain was focused on its war with France, the same country decided to take advantage of the situation and declare war on the United States.orth and South America were united by the Monroe Doctrine, and after 1900, England was eager to cater to the United States. England also made an alliance with Japan in 1902, and had Australia, the last big island, as a Commonwealth country.