Bonaparte faced a major setback and eventual defeat in the Haitian Revolution. By the Law of 20 May 1802 Bonaparte re-established slavery in France's colonial possessions, where it had been banned following the Revolution. Following a slave revolt, he sent an army to reconquer Saint-Domingue and establish a base. The force was, however, destroyed by yellow fever and fierce resistance led by Haitian generals Toussaint Louverture and Jean-Jacques Dessalines. Faced by imminent war against Britain and bankruptcy, he recognised French possessions on the mainland of North America would be indefensible and sold them to the United States—the Louisiana Purchase—for less than three cents per acre ($7.40 per km²).