This could only have been produced in a very short time period, after the Berlin Wall and end of the Warsaw Pact but before the actual breakup of the USSR. Because of this, this RAND report looks interesting, especially in its “long-term” ramifications.

Having an intact, hostile USSR but no Warsaw Pact means that to threaten Germany, it has to move through Poland first, can only put two fronts against Germany directly due to Poland not being that wide (the third has to either be a reserve/second echelon or swing through the Czech Republic), and puts the initial front line considerably farther to the east, with the Oder river being the first big obstacle. It’s an interesting piece.