In 1973, after a study as to the nature of the opponents that Rhodesia was facing, Walls summoned Ronald Reid-Daly and asked him to assemble a new army unit in response to the strategic nature of the escalating guerilla tactics of Rhodesia's adversaries. The new unit needed to combine cross-border insurgency warfare to take the fight to the enemies' bases of operation in territory under hostile governmental control (which collectively virtually encircled Rhodesia), with domestic policing counter-insurgency operations of a more traditional colonial nature, both disciplines being drawn heavily from the experiences that both Walls and Reid-Daly had learned when they had fought alongside one another in the Malayan Emergency twenty years earlier. The new unit was the Selous Scouts.