The Zimbabwe National Army (ZNA) was created in 1980 through the amalgamation of the former Rhodesian Army with the militant wings of two rival guerrilla organisations: the Zimbabwe African National Liberation Army (ZANLA) and the Zimbabwe People's Revolutionary Army (ZIPRA). To ease the integration process, large numbers of former Rhodesian servicemen and guerrillas were demobilised and the remaining troops interspersed throughout new units. By 1981, the bulk of the ZNA's manpower was concentrated in thirty-seven new light infantry battalions composed of about 37,000 personnel, almost all of whom were former ZANLA and ZIPRA guerrillas. The battalions were to be trained by a combination of British and former Rhodesian military instructors. Guerrillas from both sides resisted integration by establishing separate camps.