Chinese alchemists in the 9th century invented gunpowder as an elixir of immortality. By the 13th century they were using cannons on the battlefield http://pubs.acs.org/cen/books/83/8303books1.html
I think The Wizard of Oz is more a Theosophical allegory rather than a political one. Frank Baum was a Theosophist which was a cultish pseudo religion of the late 19th and early 20th centuries. Many artists and celebrities of the day were associated with Theosophy just as many celebs today are associated with Scientology. One of the more infamous linked to Theosophy was Adolph Hitler.
Zoroastrianism part of the Theosophy doctrine is referenced right in the title, 'OZ' stands for Oscar Zoroaster. The Wizard of Oz's full name is 'Oscar Zoroaster Phadrig Isaac Norman Henkle Emmannuel Ambroise Diggs' O.Z. P.I.N.H.E.A.D.
Norwegians take more whales per capita than the Japanese, I don't know why the Japs get all the vitriol
Zoroastrianism part of the Theosophy doctrine is referenced right in the title, 'OZ' stands for Oscar Zoroaster. The Wizard of Oz's full name is 'Oscar Zoroaster Phadrig Isaac Norman Henkle Emmannuel Ambroise Diggs' O.Z. P.I.N.H.E.A.D.