Prior to the outbreak of the Civil War, Americans had attempted to incorporate the territory between the Atlantic Ocean and the __1__ into the United States, in alignment with the principle of __2__. After the Civil War, a small group of U.S. leaders began to advocate for American expansion beyond __3__.In order for U.S. industrialists to gain greater access to __4__ markets, the United States sought to expand into new territories in the __5__ region. As a result, before the Spanish-American War, the United States purchased __6__ from Russia and annexed __7__.

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