Napoleon’s Last Gamble contains five battles from the Waterloo Campaign, which Napoleon began by seizing the central position between the Prussian and British Armies. On June 15th the Grande Armée was unleashed across the Sambre River. Allied screening forces sent out the warning to headquarters. The Allies executed a forward concentration behind the cover of their screens. As the 16th dawned, troops of both sides still converged on the battlefields.