For example the American revolution was based on national survival. The people of the thirteen colonies wanted a nation in which they were free of Britain 's tyranny. They wanted to live as an independent nation and survive as one. The American Civil War was another example of national survival. President Lincoln had the point that if the war was unsuccessful or was pushed in the right direction then the nation would be divided into the north and south. World War One was fought as a result of both the gain of territory and national survival. Austria-Hungary was expandingt into western parts of Russia and northern Italy. It was also conquering the nations to the east and taking control of their governments. The Allied powers sought to stop this expansion and war broke out in Europe. The United States then sent of troops to assist France and Great Britain in the conflict. At the end of World War One, Austria-Hungary was divided up, its territory formed many new nations as well as restored land to already existing nations. In World War Two, much of the same circumstances were present with events that contributed to the escalation of the war, and the involvement of the United States. Germany, under the rule of Hitler was expanding very slowly across Europe. It took land to the east and west of them, took over many of the new nations created by the Versailles
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