Is Saint George & the Dragon only associated with English military heraldry?
No. The Royal families of many European (and other) countries were inter-related and they shared many heraldic items. This Russian Imperial Eagle formal parade visor hat head device insignia- cockade shows that is was not. The Double-Headed Russian State Imperial Eagle Crest Coat of Arms in Gold Color Finish. The Double-headed Eagle was adopted as a Russian Emblem in 1497 by Tsar Ivan III. This Eagle, facing both East and West, was an old Byzantine Emblem of Roman origin. On the eagle breast- ancient Moscow Coat of Arms: St. George slaying The Dragon.