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 manually or with a power auger. The posts are then placed upright into the ground and concrete is poured to cement them into place. Once they are set, the horizontal rails are affixed to the posts using fasteners, and finally the pickets can be attached to the horizontal rails. By far the most time consuming part of installing a picket fence is setting the posts. There are some vinyl picket fence systems on the market that are installed without digging holes or pouring concrete. These are installed by driving pipe deep into the ground, which is how chain link fence