Okay most NATO vs Warsaw Pact fiction and scenarios have both sides getting ready and expecting the war. What I'm wondering is what would happen if Group of Soviet Forces Germany and other Warsaw Pact units attacked with little to no warning.
My idea is this, 1985 the Russians have their annual spring exercise with Warsaw Pact forces. NATO sees them standing down, but then a few days later the GSFG and other units in Czechoslovakia attack Germany. There's no air strikes till after Warsaw Pact troops have attacked across the IGB. As a result NATO air power is still spinning up as the battle starts, REFORGER hasn't happened, and NORTHAG and CENTAG forces aren't in their forward positions. The Soviet goal is to overrun Germany as fast as they can.
Is this idea possible? Can NATO hold the initial attack long enough to bring reinforcements in or do the Russians have a good chance of reaching the Rhine with what's in the GDR?
Also this is CONVENTIONAL, no nukes.