My background is technical but I taught NBC defence as well,plus recognition; so I have a mixed knowledge.
All of what you say is true but it might help to temper it with what we as the "enemy" percieved the Soviets would do between 1973 and 1985.
The Russians were expected to come when we were all on public holiday and our units would be manned to lowest levels; however we would have hoped that Int (not "Intel" thats American!) would detect any unusual activity on the other side of the border and therefore warn us of any "build ups".
To assist in this there were two teams : one in East Germany called "Brixmis" and the other in West Germany called "Soxmis" (Soviet Military Mission).
Each team was there to keep an eye out for any suspicious activity by the "other side".
To this extent SOXMIS (based in Herford) would shadow units on exercise and monitor numbers etc.
The British were issued with SOXMIS cards which gave a number to call if a SOXMIS vehicle (usually an Opel) was seen.
SOXMIS and BRIXMIS both got on well from what I heard.
Had the "baloon gone up" it was likely that the first thing that would happen was the activation of "sleepers" which were civilians we worked with from day to day in the military camps,or ordinary civilians who would ,when the call came, sabotage equipment (cut some wires,put sugar in a petrol tank) in simple but very effective ways.
This would slow down our reaction time.
In the rear it must be remembered that the whole ORBAT (Order of battle) relied on a supply of manpower from the rear to replace losses and these would be shipped in to the ports in Holland or Belgium or flown in to the Airheads.
Without these battle-replacements the opposition by us would die out.
So the air-, sea- and rail-heads would be targeted for persistent chemical agents (Blister or V type nerve).
This would slow down the whole process of resupply.
Meanwhile Spetsnaz would drop in the rear and attack the supply routes (like you see in Iraq) and the supply bases.
Biological weapons were unlikely because they are unpredictable and not very effective (except for poisoning etc).
Nuclear was more likely to be used by us to stop the attack !
Other options were that they would hit everything with nuclear then chemical before the attack.
Bearing in mind that the Katyusha puts down "H" agen which is Hydrogen Cyanide.
They fire a line of six BM21s and the resulting cloud of Cyanide laingers for about five minutes on the target before dissipating naturally (so no decontamination is needed).
Anyone breathing it in will suffocate (it stops Haemoglobin in blood from taking on oxygen, just like fags or carbon monoxide do) .
The BM21 attack would be the pre-cursor to an infantry ground attack and the ground taken would be clear when they arrived.
Any nucs used in the attack would be "tactical nucs" of the "Nominal Bomb" yield of 20 Kt . The same as used on Japan.
In the same way they would be burst above ground so the fireball would not touch the surface and the "airburst" would produce and enhanced (ie double) blast wave.
Fallout afterwards would be minimal but damage would be enhanced by the double and therefore more powerful blast effects.
Simply: one nuc would do as much damage or more than tons of HE from conventional artillery.
On the ground the Russian forces were geared to ignore and overcome any obstacle (river,night etc) so their NBC Recce teams were equipped fro fats movement,locating and marking then moving swiftely on.
Behind them the tanks and infantry woul maintain the momentum of the attack : bypassing strongpoints (then mopping up later) and or outflanking in the calssic manner.
The key element of Soviet tactics was applied and maintained force in the correct place and with momentum.
To achieve this they would probe for weakness and exploit it , then pile the reserves in behind the breakthrough to maintain the inertia.
Our job would have been to slow them down !!
