Jaruzelski was no Polish patriot. He called on Moscow to send troops to crush solidarity. When that failed, he called for martial law. It failed because Moscow made the decision in the spirit of glastnost not to get involved in another satellite state like it did in Hungary and Czechia.
Unfortunately, many Poles do buy into the myth that he saved Poland from Soviet invasion.
I can only say, that looking at the intel that was coming across my desk every day during the crisis, there was NO indication that the Kremlin was NOT going to invade. As I originally said, the Soviets had matched all the indicators for invasion that had occurred before Hungary, Czechoslovakia, and East Germany.
There was only the decision to be made and we had no inside the Kremlin info on that.