Yankee Doodle in Berlin ratings (Movie, 1919)

Captain Bob White, an American aviator is sent on a dangerous mission to Germany to steal the enemy's plans for an expected drive. Bob impersonates a woman in order to entrap the Kaiser whose weakness for women is well known. Bob flirts with the Kaiser, Hindenburg, and the Crown Prince, and each one becomes jealous of the others. Bob lures the Kaiser to his downfall with an Oriental dance. Hindenburg tells the Kaiser's wife that her husband is visiting a woman in her chambers, and the results prove disastrous for all three men. Bob eventually gains the military secrets and the enemy is defeated in time.