However, by December 1745, Louis XV's Finance Minister warned him France faced bankruptcy, leading to peace talks in May 1746 at the Congress of Breda. Despite victories at Rocoux in 1746, Lauffeld in 1747, and Maastricht in 1748, the cost of the war and the British naval blockade meant the French economic position continued to deteriorate. As a result, their gains in the Austrian Netherlands were returned after the Treaty of Aix-la-Chapelle in November 1748.