  The jeep problem was first solved by O. Helmer and N.J. Fine. But not much
later, C.G. Phipps formulated a more general solution. He formulated a
so-called convoy or caravan variant of the jeep problem and reduced the
original problem to it. We shall refine the convoy idea of Phipps and
subsequently view a more general jeep problem, which we solve for jeep convoys
as well as for a single jeep. In the last section we solve Maddex' jeep
problem.
