1939 Partition of Poland between Stalin and Hitler
1939 – 1940 Successful offensive war against Japan and Finland
1940 Aggression against six neutral
European states — Poland, Finland, Estonia, Lithuania, Latvia and Romania
1941 Preparation for an aggression on a massive scale
More than five million of regular Red Army troops were deployed near the west frontier (not mentioning 1000000 of paratroopers). Also two dozen of thousands of advanced tanks and aircrafts, the best in the world artillery were ready to ‘liberate’ Europe, thereby to paint all Europe red color.
But Hitler had launched his surprise attack and disturbed Stalin’s plan to conquer Europe. Anyway, Stalin did his best to take at least half of Europe at the end of the WWII.
By 1941 USSR had biggest army and the best armaments ever, including more than 23000 of tanks and 18000 aircrafts, 60000 of cannons, while no army in the world didn’t have anything like that even in their military dreams at that moment.
Hitler simply had no choice at that moment whether attack USSR or not, because he knew very well that the Soviets were preparing offensive operation on eastern borders with dense concentration in south, not far from the Germans only oil in Romania.
But the scale of this preparation made by communists to “liberate” Europe he appreciated much later.
So, if it wasn’t for the Soviets and their aggressive plans Britain would have been strangled by the Germans (just question of time). And at the same time if it wasn’t for the preventive attack on USSR whole Europe would have been painted RED. And there was nothing they could do about it.
"Only naive people believe that the chief task of fortified zones is defence. This is not so. Fortified zones are built so that an offensive may be prepared in greater security. They must also securely conceal the deployment of groupings of shock troops, repel any enemy attempt to disrupt their deployment, and support our troops with all possible fire power when they go over to the offensive. "
Major-General PIOTR GRIGORENKO
(Memoirs, New York 1981, p. 141