The first civilizations didnt use metal very often, but when they did it was usually for farming tools.
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The reason for the United States of America's departure from Vietnam in 1973 was that President's Nixon administration was already under heavy scrutiny and criticism for maintaining the United States troops installed in South Vietnam.
After very difficult moments such as teh Tet Offensive, the American society in general, and the young Americans in particular, started to seriously question the participation of the United States Army in the Vietnam War, concluding that was not a US war. They started to demand the withdrawal of the US troops from Vietnam and organized many protests and marches to demand action on the part of the federal government.
Finally, in January 1973, a peace agreement was signed and the US started to withdraw its troops. The process lasted until March 29, 1973.
However, the United States contib¿nued to support
South Vietnam, applying the foreign policy of containment to impede the spread of Communist over South Vietnam.
It was "B. General William T. Sherman" who famously said that freed slaves should be given “40 acres and mule” so they could become independent farmers, although this idea had been floated by others as well.
At the end of the French and Indian War the British government signed treaties with the Indians in the Ohio territory to restrict the American colonists from moving into there land. The American colonists ignored this British treaty, and started settling in the Ohio, Kentucky, and Tennessee areas. The British government, unlike the American government in the following century (which very seldom honored the treaties they signed with the Western tribes), tried to honor their treaties with he Indians and keep the Americans out. This brought the Americans and British into confrontation and was one of the main factors that led to the Revolution.
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