The Rhodesian attacks on ZANLA and ZIPRA bases did much to restore white morale following the Viscount incident , though they had not actually made much impact on the respective guerrilla campaigns . Nkomo and the Zambian President Kenneth Kaunda all the same requested further military aid and better weapons from the Soviets and the British respectively . Martial law was quickly extended across Rhodesia 's rural areas , and covered three @-@ quarters of the country by the end of 1978 . Air Rhodesia , meanwhile , began developing anti @-@ Strela shielding for its Viscounts . Before this work was completed , ZIPRA shot down a second Viscount , Air Rhodesia Flight 827 , on 12 February 1979 . This time it were no survivors .