Looks like I'll be sleeping on the couch tonight. Still a good example: Dorothy sets off the war by killing the one witch. (shades of WWI. Assassination)
"Arbitrator" Glinda gives Dorothy dead witch's property (Splitting up Germany after WWII)
Wicked Witch wants what Dorothy has, and does everything in her power, including sending her army after her, public threats, etc... (picture post-war USSR)
I think you get the picture