USS Theodore Roosevelt (CVN-71) is the fourth Nimitz-class, nuclear-powered, aircraft carrier in the United States Navy. She is named in honor of Theodore Roosevelt, the 26th President of the United States and a proponent of naval power. She is the fourth ship named in honor of Theodore Roosevelt, three bearing his full name and a fourth with just his last name. Another three U.S. Navy ships have "Roosevelt" in their names in honor of members of the Roosevelt family. This carrier's radio call sign is "Rough Rider", the nickname of President Roosevelt's volunteer cavalry unit during the Spanish–American War. She was launched in 1984, and saw her first action during the Gulf War in 1991.