The Rise of Motorcycle Warfare.

When the First World War began, the age of cavalry warfare reached its natural conclusion. For millennia, the mobility, the speed, and the sheer power of the mounted horsemen provided an unmatched battlefield advantage, whether by the chariot, by the bow, or by the lance.

But once the Gatling gun and the tank made their way to the front lines, and once those front lines were ashamed by trenches and heavy artillery, cavalry was rendered nearly useless.

The world still occasionally saw the use of the mounted soldier, whether in Peshiba in 1917, or in Bataan, and on the shores of Russia's Don River in 1942. But outside of an incredibly narrow set of circumstances, there is simply no place for cavalry in modern warfare.