Had they prevailed in Germany and especially Spain, they would have been direct proxies of the USSR, much like the Warsaw Pact nations.

I disagree entirely, people are mostly obsessed with power, what in gods name was going to make these foriegn communists work hard and then just hand it all over to the SU, they had thier own ideas thier own plans, they could have had good relations with su but they would have been under the su's control as much as france was under usa's control after ww2

I think the warsaw pact nations just proves the point even more, the only way for the su to rule over foriegn nations was through a huge army threatening any descent, and as this was one big land mass in eastern europe it was possible, but spain was half of europe away, through a load of countries or a damn long boat ride away, as shown by countless examples communists would not hand over power to the SU