of Vienna returned France to its pre-war size and the number of departments was reduced to 86 (three of the original departments having been split). In 1860 France acquired the County of Nice and Savoy, which led to the creation of three new departments. Two were added from the new Savoyard territory, while the department of Alpes-Maritimes was created from Nice and a portion of the Var department. The 89 departments were given numbers based on the alphabetical order of their names. The department of Bas-Rhin and parts of Meurthe, Moselle, Vosges and Haut-Rhin were ceded to the German Empire in 1871 following France's defeat in the Franco-Prussian War. A small part of Haut-Rhin, however, remained French and became known as the Territoire de Belfort; the remaining parts of Meurthe and Moselle were merged into a new Meurthe-et-Moselle department. When France regained the ceded departments after World War I, the Territoire de Belfort was not reintegrated into Haut-Rhin. In 1922 it became France's 90th department. Likewise the Lorraine departments were not changed back to their original boundaries, and a new Moselle department was created in the regained territory, with slightly different boundaries from the pre-war department of the same name. The reorganisation of Île-de-France in 1968 and the division of Corsica in 1975 added six more departments, raising the total in Metropolitan France to 96. By 2011, when the overseas collectivity of Mayotte became a department, joining the earlier overseas departments of the Republic (all created in 1946) – French Guiana, Guadeloupe, Martinique and Réunion – the total number of departments in the French Republic had become 101. In 2015 the Urban Community of Lyon was split from Rhône to form the Métropole de Lyon, a sui generis entity, with the powers of both an intercommunality and those of a department on its territory, formally classified as a "territorial collectivity with particular status" () and as such not belonging to any department. As of 2019 Corse-du-Sud and Haute-Corse are still administrative departments, although they no longer have the status of departmental "territorial collectivities": region and department functions have been managed by a "single territorial collectivity" since 2018. Despite the intention to avoid the old nomenclature, often the names of pre-1790 provinces remained in use. For example the name of Berry, though no longer having an official status, remains in widespread use in daily life. General characteristics Government and administration The