The Gentleman from America (1923)

Two pals in the A. E. F. are given a furlough. With a borrowed dollar they "clean up" in a crap game and start for Paris. Instead they land in Cardonia, a principality of Spain. Hero is mistaken for a bandit and falls in love with the prettiest senorita in Cardonia. After a series of exciting adventures he saves the girl from marriage with the villain, finds she is the daughter of the Grand Duke, and becomes assistant ruler of the kingdom. The last seen of hero he is back in camp doing k. p. duty for overstaying his leave.