He continued the Monroe Doctrine and used the country's military might to influence Latin American politics. He had the Panama Canal built (which allowed ships to travel in less time by taking a shortcut). In doing so, he created the independent country of Panama, which before was part of Colombia, by invading it. He also took a part for the United States, which is where the canal was built. It was not turned over to Panama until 1999. As president, he was interested in what happened in other countries. In 1905, he helped to end the war between the Russian and Japanese empires. Everybody thought Russia would defeat Japan, but the result was the opposite. Roosevelt met both parties and convinced them to sign a peace treaty. He won a Nobel Peace Prize for this work in 1906. He was the first president of any country to win the prize.