New expansion kit for Napoleon's Last Gamble.
On June 14th, Wellington learned that Napoleon’s invasion of Belgium was imminent. Intelligence reports had confirmed that Napoleon was concentrating his Army in the Maubeuge-Beaumont area to the south of Charleroi and Mons. Napoleon could proceed either via Mons to Hal and Brussels or Charleroi to Mont St Jean to Brussels.
Wellington had foreseen both possible attack routes. He had ordered his staff, two months earlier, to survey suitable battlefield positions for both the Hal and Mont St. Jean areas. Wellington was extremely concerned that the master of maneuver, Napoleon, could outflank his position if the battle occurred at Mont St. Jean. A relatively large force (~ 17,000 men) would be positioned at Hal to block that possibility. If the battle occurred at Hal, these troops would first delay and then form a point around which the battle would be fought.
Wellington wanted to have a viable retreat route around the western environs of Brussels if his troops failed to stop Napoleon. The Hal dispositions were one of the key components to protecting his retreat route and lines of communications.