The focus here is on the individual inventor and the arduous path of invention. The invention of the tank itself was in dispute during the First World War. Its adaptation as the flail tank of the Second World War once again raised the spectre of lack of due credit given to its inventor—as well as demonstrating the convergence between invention and utility. It was Union Defence Force Major A.S.J. du Toit who claimed to have invented the flail tank, an invaluable vehicle used to detonate mines, allowing for the advance of infantry. Yet there were rival claimants for the tank and the chapter looks at the inception of the idea as a response to real-world conditions on the battlefield, the path of invention and testing and the rival claims that were presented before the Royal Commission on Awards to Inventors in London. The case study of the flail tank also demonstrates the ways in which the UDF collaborated with their British counterparts in the development of the tank—it was a South African invention that could only be realized with the aid of British resources.