intensified, the ZNDF had to contend with a number of armed incursions by Mozambican National Resistance (RENAMO) insurgents, who raided Zambian border towns in search of food and other supplies. The ZNDF made it a policy to pursue RENAMO into neighbouring Mozambique in hot pursuit if necessary. In 1988, a second coup d'état attempt was planned, this time by Lieutenant General Christian Tembo and at least three other senior army officers. The conspirators were detained before they could carry it out, but this temporarily jeopardised relations between the Zambian government and the army. The end of the Cold War brought a number of changes to the Zambian political situation and the ZNDF. The ZNDF remained heavily in debt with the former Soviet bloc for military equipment it had purchased in the 1980s, as well as interest accrued. The army in particular was badly affected by the collapse of its Soviet technical training program, which left much of its heavy weapons unserviceable. Following mass protests over President Kaunda's decision to cut subsidies for maize meal and double maize prices in 1990, Captain Mwamba Luchembe single-handedly seized the national radio station and announced a coup d'état. Luchembe held the radio station for only two hours before being arrested. Kaunda's unpopularity led to demonstrations in support of Luchembe, however, and the same day the president announced he would seek a referendum on democratic multi-party elections. Kaunda granted a blanket amnesty to his political opponents as he prepared to accept the return of multi-party elections, which would shortly thereafter end his term of almost three decades. Among those who received amnesty was Alexander Saimbwende, who surrendered to the government and ended the DSC insurgency. The 1991 general elections brought Frederick Chiluba and his opposition Movement for Multi-Party Democracy to power and ushered in a period of reforms for the ZNDF. The Chiluba government dismantled the ZNDF's unified command structure and allowed the army, ZNS, and air force to revert to independent commands. The system of political patronage introduced to the ZNDF by Kaunda was also abandoned. A general demobilisation programme was instituted in the army, and parliament gained the ability to debate defence expenditure. The Chiluba government immediately formed a Public Accounts Committee to reduce financial irregularities in the ZNDF, most of which were linked to corruption and abuse of the ministerial tender system. Zambia's 1991 constitution formally reinstated the title Zambian Defence Force