Operation Cauldron was launched by the Rhodesian Security Forces in response to an incursion by ZIPRA insurgents on 28 December 1967. Despite the death or capture of 77 out of 79 men, ZAPU, from its base in the Zambian capital, Lusaka, did not regard the incursion as a failure; on the contrary, its leaders were pleased that they had inflicted some casualties on the Rhodesian African Rifles. Buoyed by what they perceived as a success, they planned another operation to take place in northern Mashonaland: about 100 men—75 ZIPRA and 25 MK—were to infiltrate the Zambezi valley and establish a series of camps, including underground caches containing food, clothing, weapons and other equipment. They were instructed to avoid the Rhodesian Security Forces "at all cost" while they recruited local tr