The form of the camps was a square.

In later times, they sometimes, in imitation of the Greeks, made them circular, or adapted them to the ground.

The camp was always surrounded with a ditch and rampart, and divided into two parts by a broad street, and into subdivisions by cross-streets and alleys.

Each tent was calculated to hold ten privates and a petty officer.
In the middle ages, the form of the camp did not differ very essentially from that of the Romans, the variation consisting principally in the interior arrangements, these arrangements being made to correspond to the existing mode of forming a line of battle.

The details of this system may be found in the military work of Machiavelli.
The art of fixing a camp in modern times is the same as taking up a line of battle on the same position.