Vive La France!
June 18 th, 1815, onward: Napoleon is victorious at the Battle of Waterloo and all surviving British and Prussian troops are taken prisoner. Napoleon then orders a march on Berlin but on the way there he occupies The Hague and Amsterdam and he reorganizes the Netherlands into the Walloon Republic, since the Batavian Republic didn’t work so well, and it has more direct orders from Paris. The Walloon government then signs an alliance with France and then declares war on Britain and Prussia.
August 13th, 1815, onward: Napoleon reaches Berlin and in a bold move offers the Prussians a choice: Ally with France, and survive; or be conquered and divided between a reconstituted Poland and the newly reformed Confederation of the Rhine. Prussia, not fearing Napoleons armies, bluntly refuses, and launches an ill planned wave of assaults on the entrenched French forces, costing the Germans thousands of needless deaths.
August 14th, 1815, onward: Napoleon forces the already devastated Prussian Army to fight at the Battle of Berlin, in which the French land a crushing victory on the Kaisers Armies, and true to his threat, Napoleon divides Prussia between a newly re-constituted Duchy of Warsaw, which is then given half of Prussia east of Berlin and a sea coast on the Baltic, and it then is reformed into the Republic of Poland; while the Confederation of the Rhine annexes the rest of Prussia and is reorganized into the German Federation. Both of which, after having their new governments organized, declare war on Britain.
August 22nd-31st, 1815, onward: France signs non-aggression pacts with Spain, the Ottoman Empire, Russia, Sweden, Denmark-Norway, and after long exhausting talks between both nations Emperors, Austria. These 6 nations are free to do as they please and are in no way subject to France
September-December 1815: Napoleon prepares France for an invasion of the British Isles.
January-March, 1816: France continues to prepare for his invasion of England.
March, 1816, onward: Napoleon orders the French, Polish, Dutch, and German navies to block the English Channel at all costs, and it is successful, allowing the French Alliance to land 450,000 troops in southern England after several hundred transports cross the channel many times over, and at a cost of over 45 Allied warships, while several hundred cannon and thousands of horses for the cavalry. After establishing a strong defensive perimeter to fall back on should they need it, they begin to push northward toward London.