After capturing and killing Dingiswayo, Zwide sent his messengers to Shaka, asking Shaka to pledge his allegiance to him. “Now that I have removed your head” Zwide had boasted, “why don’t you just bring the whole body before me, or I will toss the body into the river Thukela”. Shaka had been expecting this, but had summoned enough courage to reply to Zwide: “The body had two heads like the great river-snake Nkanyamba. You were just too foolish to see the other head”. Shaka immediately incorporated the Mthethwa with his own tribe and built a powerful army, but it was yet smaller than that of Ndwandwe. In 1818 Zwide sent his army to attack the Amazulu, but Shaka, a clever general, tricked them. The Zulu army was small and weak, but Shaka knew that the Ndwandwe army did not carry food on its raids. When the Ndwandwe’s forces entered the Zulu kingdom, they found no food because the Zulu army had burnt or buried it. The Zulu army had also gone hiding- with all the kingdom’s cattle. One night, the Zulus attacked the Ndwandwe where they had set up camp in the Zulu kingdom, killing many of the Amabutho as they slept.