Before becoming President of the United States, Theodore Roosevelt<span> was the Assistant Secretary of the Navy. He resigned in 1898 to organize the Rough Riders, the first voluntary cavalry in the </span>Spanish-American War<span>. The U.S. was fighting against Spain over Spain's colonial policies with Cuba.
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Scholars played numerous roles in the beginning of the italian renaissance but perhaps the most significant is that they spread the ideas of the books that made everything possible.
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In Russia, efforts to build communism began after Tsar Nicholas II lost his power during the February Revolution, which started in 1917, and ended with the dissolution of the USSR in 1991.
Meriwether Lewis and William Clark are best known for their expedition from the Mississippi River to the West Coast and back. The expedition, called the Corps of Discovery, was President Thomas Jefferson's visionary project to explore the American West. It began in May of 1804 and ended in September 1806.