The Spanish Conquistadors first intoduced the horse to New Mexico during the 1500's, now we use several horses we have found running free on some of the ranches we have occupied for reconnaissance patrols. Some girls from the pageant are expert horse riders, and are training others to ride. Our horses can carry lots of supplies and now our patrols are going farther and farther out. We have used dirt bikes and ATV's in the past but they tend to draw lots of infected, along with bands of armed men.
A girl fighting from horseback has the advantages of greater height, speed, and inertial mass over an infected on foot. Another element of horse mounted warfare is the psychological impact a girl on horseback can inflict on the infected. So far no patrol has been attacked by the infected while on horesback, the infected seem to be afraid to get close to a horse as do most living human beings.
Just like the Romans, Greeks, Spaniards,Cossacks and other famous armies, all our patrols carry swords for a mounted attack on the infected if need be. The silenced HK MP5SD is the standard weapon carried by the long range reconnaissance patrols so as not to spook the horses.
The mobility and shock value of the cavalry was greatly appreciated and exploited in the Ancient and Middle Age, and hundreds of years later the same principles apply to fighing the infected today.