<span>Roosevelt asserted American power with the Monroe Doctrine. It outlined the fact that the United States would not be controlled by European countries.</span>
By 1860 almost half of the American people lived west of the Appalachian Mountains. In the 19th-century movement of settlers into the American West, was initiated with the Louisiana Purchase and Lewis and Clark´s expedition. I was also triggered by the California Gold Rush, the Oregon Trail and "manifest destiny." Manifest destiny was the believe that Americans were meant to expand across all of North America.
<span>The events that led to the </span>increase<span> in </span>tensions between<span> the </span>British<span> and the </span>colonists<span> after 1767 are The Tea Act, The </span>Boston Massacre<span>, and the Intolerable Acts.</span>
