For France, the results of the siege were mixed. The city's stubborn defence tied down Marlborough for the remainder of the 1708 campaigning season, preventing him from inflicting further damage on France in the aftermath of Oudenarde. But, with the loss of Lille, northern Flanders reverted to allied control; the Allies moved against Ghent, taking the city in late December. The fall of Lille also opened a corridor for an allied invasion of France in 1709, but this effort would run into a bloody standstill at the Battle of Malplaquet.