units of government that still retained a fair measure of autonomy—but not for long—were the so-called local collectivities, i.e. chiefdoms and sectors (the latter incorporating several chiefdoms). The unitary, centralised state system thus legislated into existence bore a striking resemblance to its colonial antecedent, except that from July 1972 provinces were called regions. With the January 1973 reform, another major step was taken in the direction of further centralisation. The aim, in essence, was to operate a complete fusion of political and administrative hierarchies by making the head of each administrative unit the president of the local party committee. Furthermore, another consequence of the reform was to severely curtail the power of traditional authorities at the local level. Hereditary claims to authority would no longer be recognised; instead, all chiefs were to be appointed and controlled by the state via the administrative hierarchy. By then, the process of centralisation had theoretically eliminated all preexisting centres of local autonomy. The analogy with the colonial state becomes even more compelling when coupled with the introduction in 1973 of "obligatory civic work" (locally known as Salongo after the Lingala term for work), in the form of one afternoon a week of compulsory labor on agricultural and development projects. Officially described as a revolutionary attempt to return to the values of communalism and solidarity inherent in the traditional society, Salongo was intended to mobilise the population into the performance of collective work "with enthusiasm and without constraint". In reality, the conspicuous lack of popular enthusiasm for Salongo led to widespread resistance and foot dragging (causing many local administrators to look the other way). Although failure to comply carried penalties of one month to six months in jail, by the late 1970s most Zairians shirked their Salongo obligations. By resuscitating one of the most bitterly resented features of the colonial state, obligatory civic work contributed in no small way to the erosion of legitimacy suffered by the Mobutist state. Growing conflict In 1977 and 1978, Katangan rebels based in Angola launched two invasions—Shaba I and Shaba II—into the Katanga Province (renamed "Shaba" in 1972). The rebels were driven out with military assistance from the Western Bloc, particularly from the Safari Club. The Battle of Kolwezi, fought in May 1978, resulted in an airborne operation in an aim of rescuing Zairian, Belgian and French miners held as hostages by pro-Communist Katangan guerrillas. In the last three