Bully and Billy

The Voyagers end up in Santiago, Cuba on July 1, 1898 during the Spanish-American War, but the Spanish are winning, because Theodore Roosevelt and the Rough Riders aren't there to help because Billy the Kid killed Roosevelt in 1880. After helping Benjamin Franklin with his kite in Philadelphia, Pennsylvania on June 10, 1752, they time travel to 1880 and team up with Billy's outlaw gang to prevent the future U.S. president from being shot in the American Old West.