The map above shows the following situation:
F HEL S F HOL - NTH (8 possible retreats, not counting Norway) F IRI S F ENG - MAO (8 possible retreats) F EAS S F AEG - ION (7 possible retreats) F BOT S F LVN - BAL (5 possible retreats) A RUH S A BEL - BUR (5 possible retreats) A SEV S F BLA - RUM (5 possible retreats) A VEN S F ADR - TRI (5 possible retreats) A SMY S A ANK - CON (4 possible retreats) F PIE S F MAR - LYO (4 possible retreats) A MOS S A UKR - WAR (4 possible retreats) A FIN S A SWE - NOR (4 possible retreats, not counting North Sea)
Total number of retreat possibilites is 8x8x7x5x5x5x5x4x4x4x4 = 71,680,000
Total number of retreat and disband possibilities is 9x9x8x6x6x6x6x5x5x5x5 = 524,880,000.