Well to be fair I don't think I ever heard of "the Balkans" while I was growing up, including in college.
Of course back then "the Balkans" were behind the iron curtain, mostly inaccessible to Americans, just part of the USSR. The only way I would have heard of the Balkans is if they had an Olympic skating team or such, which of course they didn't.
None of the Balkans were part of the USSR. Only Bulgaria, a member of the Warsaw Pact, was a Soviet ally. Albania and Yugoslavia were independent Communist states, and Greece was a NATO member.