War and violence. While epidemic disease was by far the leading cause of the population decline of the American indigenous peoples after 1492, there were other contributing factors, all of them related to European contact and colonization. One of these factors was warfare.
One of the main reasons why Japan <span>invaded Manchuria in 1931 was because they needed more natural resources to expand their empire, since Japan is a relatively small island nation. </span>
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The Constitution gives powers to Congress and any disputes are determined by the Supreme Court. The executive power is vested in the President, even though power is usually delegated to the Cabinet members and other officials. The judiciary explains and applies the laws.
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