The towns of Menton and Roquebrune, which had been the main sources of income for the Grimaldi family for centuries, were now accustomed to a much-improved standard of living and lenient taxation thanks to the Sardinian intervention and clamoured for financial and political concession, even for separation. The Grimaldi family hoped the newly legal industry would help alleviate the difficulties they faced, above all the crushing debt the family had incurred, but Monaco's first casino would not be ready to operate until after Charles III assumed the throne in 1856.