This battle was played on 19 December, with Michael kindly offering to host it at his office at Marrickville. The Russians were led by John as Kutusov, faced by Dave and Michael as Napoleon and Soult respectively (the presence of Napoleon on the field giving John some qualms about the imminent arrival of the Guard).
The Situation (spoiler and intelligence-free, I trust).
The Grande Armée crossed the Rhine in late September, advancing inexorably to the east with no enemy contact. This changed as they approached the eastern frontier of Bavaria - Austrian scouts, then major formations, were met along the valley of the river Inn. Even as the lead elements of the army, under the immediate direction of Marshal Bernadotte, started to probe across the Inn, new intelligence was received from the Bavarians, with whom an alliance was concluded on the 1th of October.
They had been aware, through their local agents, of Kutusov's 1st West Army since it had crossed their frontier some days earlier. On concluding the alliance they advised the French of the Russian presence, now well south of the Danube and apparently heading for Munich. Marshal Soult was ordered to take his IV corps off to intercept them. Soult's scouts located a strong column of Russians marching south from the Iser river crossing at Freising via Erding and Markt Schwaben. Without waiting for reinforcements from other corps, Soult made haste to surround the head of the column. It had reached the village of Ottenhoven, a couple of miles north of Markt Schwaben, and Soult launched his assault just after 10:00am on the 23rd.
