But perhaps the most notable instance of this increased militarization was the rise of the Zulu under the leadership of Shaka. Pressures from the English colonialists in the Cape and increased militarization of the Zulu resulted in the Mfecane (the crushing). The Zulu expanded by assimilating the women and children of tribes they defeated, if the men of these Nguni tribes escaped slaughter, they used the military tactics of the Zulu to attack other groups.