Well, how extensive is the war? Are we talking an "Alas Babylon" scenario with full-out war or a much more limited one? Heck, in a ground war there is a chance the Red Army might enter France and dictate their own terms! I'd like to know more about the war before making more conclusions.
My Favorite senario is This
the 1961 Berlin Wall Crisis escalate in full scale War.
as Firefight happen under NATO and Sovjet troops at Checkpoint Charlie on 27 october 1961
suspecting this a Sovjet Invasion of West Berlin give U.S. Comand in Berlin NATO Alert
suspecting this a NATO Invasion of East Berlin, Red Army Commader give Alert to Moscow
SAC launch SIOP-62 plan and start attack on 1077 targets in
the Sovjet, China, Eastern Bloc, north Korea, north Vietnam.
with ICBM, MRBM, SLBM, SRBM and Bomber.
in same time NATO troops defend there Base until the Tactical Nuke are read to use
as first sovjet MRBM hits NATO HQ in France and NATO Base in Germany, Italy and Britain.
Moscow is vaporise by SAC with 100 MEGA TONS on Nuclear weapons. during 15 hours attacks
over the hours hunders tactical nukes explode In north Europe and east Europe.
after 15 hours the first phase of SIOP-62 end and SAC check on Sovjet counter attack
but there is no more counter attack...
in this Senario the Nedelin catastrophe never happen
http://en.wikipedia.org/wiki/Nedelin_disaster
Chief Marshal Nedelin makes the R-16 operational capability in july 1961
so there ICBM attack on USA Washington D.C. , New York, Chigago, Los Angeles
non of Sovjet Bomber get true USAF Air defense
several Canadian City near US border are nuke by mistake by
Sovjet Bomber crew thinking there over USA
also Sovjet Submarine attack on East coast and in US. Base in Pazific
(Okinawa, Guam mabye Hawaii)
Aftermat:
North and East Europe is devastated
Britain, West and East Germany, east Europe, Sovjet Union and China are destroy
except Hungary how is Spared in SIOP-62 plans
Scandinavia is contaminated with deadly radioactive fallout from Britain push by the wind.
after a week the Radiation falls on nievau of 1986 Chernobyl except,
massive Fallout areas around Paris, Berlin, Frankfurt an Main, Hambrug, Moscow, Beijing,
Washington D.C. , New York, Chigago
except the miracle of Los Angeles were the R-16 malfuntion and hit Nevada desert.