Mayotte therefore became a French island, but it remained an island emptied of its inhabitants by decades of wars, as well as by the exodus of former elites and part of their slaves: most of the cities were abandoned, and nature regained its rights over the old plantations. The French administration therefore tried to repopulate the island, recalling first of all the Mayotte exiles or refugees in the region (Comoros, Madagascar), proposing the former exiled masters return in exchange for compensation, then by inviting wealthy Anjouan families to come and set up trade. France launched some first major works, such as the realization in 1848 of the Boulevard des Crabes connecting the rock of Dzaoudzi to Pamandzi and the rest of Petite-Terre.