In the late thirties the Caterpillar Tractor Co produced a machine that all but made the horses history. It was a four cylinder narrow gage
model of the D-4 designated as Model 2-T. It could be delivered in a landing craft, cargo plane or by glider. It saw a lot service in Europe
in the mountainous areas of Italy and Austria, as an artillery caisson. In the pacific they were fit with mechanical blades that were raised
by an add on winch system. They fulfilled the almost constant need to repair island air strips.