Really? Can you quote a published historian who considers the Winter War between Russia and Finland part of WWII?
...well...OK.
I suppose we could start with Encyclopedia Brittanica:
Russo-Finnish War, also called Winter War, (Nov. 30, 1939–March 12, 1940), war waged by the Soviet Union against Finland at the beginning of World War II, following the conclusion of the German-Soviet Nonaggression Pact (Aug. 23, 1939).
http://www.britannica.com/event/Russo-Finnish-WarYou could go on to Dupuy and Dupuy, "Military Heritage of America," McGraw-Hill, New York, 1956, which lists "The Soviet-Finnish War, 1939 to 1940" among the "Early Campaigns of World War II. See pages 431-433.
Similarly, the West Point Atlas of American Wars, Volume II, Praeger 1959, lists the Soviet-Finnish War of 1939-40 as among the "Early Campaigns" of WWII. See maps 8-10.
Liddell Hart, in his "History of the Second World War," G.P. Putnam's Sons, New York, 1970, places his Chapter 5 ("The Finnish War") after the overrunning of Poland and the Phony War, at pages 43-48. The title of the book says something about his views on which war included the Winter War.
We could probably spend quite a bit more time tracking down similar historians. On the other hand, can you quote a published historian who doesn't think that the Winter War was part of WWII?
- oldman