In essence, I would agree with you, except for the Communist belief that they are on the leading edge of a societal wave that will dominate the world. This found expression in the (insert number here) Internationals at first. When the Soviets gave up on that methodology in the late 1930s, it became more popular to support insurgencies around the world. There were brushfire wars going on all over the world from the 1950s through the early 1990s that were at least partially instigated by the Soviet Union.
You only know about the famous ones - Korea, Afghanistan and Vietnam. Perhaps Cuba. But you don't know so much about Nicaragua, El Salvador, Angola, Malaysia...the list goes on for a long time. So I give you a link with at least outline information about them.
I hope you'll take this opportunity to educate yourself about Soviet aggression.