As a result of the Social War (91–88 BC), all Italians were granted Roman citizenship, the old allied "alae" were abolished and their members integrated into the legions. Regular annual conscription remained in force and continued to provide the core of legionary recruitment, but an ever-increasing proportion of recruits were volunteers, who signed up for 16-year terms as opposed to the maximum 6 years for conscripts. The loss of "ala" cavalry reduced Roman/Italian cavalry by 75%, and legions became dependent on allied native horse for cavalry cover. This period saw the large-scale expansion of native forces employed to complement the legions, made up of "numeri" ("units") recruited from tribes within Rome's overseas empire and neighbouring allied tribes. Large numbers of heavy infantry and cavalry were recruited in the Roman Provinces of Hispania, Gallia and Thracia, and archers from the Eastern Mediterranean, ( Mostly from Thrace, Anatolia and Syria ). However, these native units were not integrated with the legions, but retained their own traditional leadership, organisation, armour and weapons.