i thought France still had Belgium after napoleons first defeat?
whoes Talleyrand?
No. After Leipzig and the Seventh Coalition, Napoleon had to abandon his German conquests. France it's self was invaded and Napoleon attempted to defend it until he had to capitulate. The Congress of Vienna reduced France to her 1790 borders -- she abandoned her conquests on the Rhine but was allowed to keep the Comtat of Avignon as well as Savoy and Nice.
After Waterloo and the Hundred Days, Nice and Savoy were returned to Sardinia, France had to pay an indemnity of ₣700,000,000 (£28,000,000) to the allies for expenses, and host an occupation army of 150,000 men, 30,000 from each Great Powers of Austria, Prussia, Russia, and England, and some minor German states too. The occupation was to be for no less than three years, and occupy the major fortifications of France from Cambray to Fort Louis, Valenciennes and Quisnois; Meuberg and Landtecy. France would pay for this occupational army at their expense. They would pay further indemnities to various other powers too for the "spoiltation" of war during the Revolution; these were valued at some ₣735,000,000 (£29,500,000). Millions of Francs were provided for smaller powers as well, so that France was paying, besides maintaining the occupational forces was no less than ₣1,500 and ₣35,000,000 francs (£61,500,000 in sterling).
The British in the spirit of reconciliation, gave up their portion of the indemnity, some £5,000,000 sterling, whilst the Dutch King used his funds to rebuild the barrier forts Joseph II had tore down.
As for Talleyrand, I am super surprised you don't know who he was.
Here. He was an amazing politician and one of Napoleon's greatest political servants. He's one man whom played a role in Napoleon's rise. An Ancién Regime aristocrat, he embraced the Revolution, embraced Napoleon, and turned on him, embraced the Bourbons and (secured) their succession.