Where else has this plot come up?

In the series 6 finale, one subplot that ties into the main mystery of the episode is that a politician was basically trying to start World War I early in order to profit. I remember similar schemes from Moriarty in two films — the film version of “League of Extraordinary Gentlemen,” and the second of the Guy Ritchie / Robert Downey, Jr. “Sherlock Holmes” films. Does anyone know if there are more mystery stories that have used this?