Theodore "Teddy" Roosevelt served as the 26th President of the United States from 1901-1909. He was a renowned conservationist who oversaw the creation of 150 million acres of national forests and doubled the size of the national park system. Roosevelt had a passion for nature from a young age and was known for his adventurous spirit. As president, he advocated for expanding America's role on the global stage and helped negotiate an end to the Russo-Japanese War, winning the Nobel Peace Prize.