The Soviets were quite open about aiming for world conquest, starting with Europe. They tried it first in 1920, but Poland miraculously defeated them. WWII was another attempt (had Hitler not attacked first, Stalin would probably just attack Germany within a short period of time) - first Poland and Germany, then France, Spain, Italy, UK etc. It only stopped at Poland and Eastern Germany that time because of strong backing of the US for the Western Europe.