Roman army of the mid-Republic x 700m = ca. 50 hectares). Along the perimeter, a ditch ("fossa") would be excavated, and the spoil used to build an earthen rampart ("agger") on the inside of the ditch. On top of the rampart was erected a palisade ("vallum") of cross-hatched wooden stakes with sharpened points. Within this precinct, a standard, elaborate plan was used to allocate space, in a pre-set pattern, for the tents of each of the various components of the army: officers, legionary infantry (split into "hastati", "principes" and "triarii") and legionary cavalry, Italian allied infantry and cavalry, "extraordinarii" and non-Italian allies. The idea was
Picket fence affixed vertically to the rails. These boards with pointed tops are called "pickets" for their resemblance to the pointed stakes historically used by infantry to repel cavalry. Picket fences can be made of several types of materials. Historically, wood has been the most popular material used for picket fences. This wood can be untreated, treated, or naturally insect and rot resistant. Other non-wood options are available; including vinyl, aluminum, and PVC. The first step in installing a picket fence is to insert the posts into the ground. Traditionally this is done by digging deep holes (usually 36in x 12in) either