Poker has a mysterious past and cannot be definitely traced to a certain point in the history of card playing. It resembles a Persian game, which went by the name of NAS and may have been brought to the states via sailing ships the anchored in New Orleans. French Canadians who came down to New Orleans and helped to settle the city may have also brought poker to New Orleans. From the city of New Orleans, the game traveled up river on the Mississippi as the gambling game of choice on paddle wheelers. The steamboat game that was played at the time was 5-card stud. This game grew in popularity and was taken to heart by the soldiers and frontiersmen that came into contact with it in the saloons that were located on the river. From there it moved west and east, as travelers liked the game as a game to gamble on among friends. The game really moved west during the outbreak of the gold rush and then grew in popularity during the Civil War. Between the soldiers playing the game and the fact that every saloon offered the game to its patrons, the country became hooked on poker.
After the Civil War, the game changed to 5-card draw as you could get more bets in on a single hand...