Originally used to describe camps in a military context, often under threat of attack.

Battlefield Origin

Emphasizes the collective action of forming a protected area for a group's safety.

Group Safety

Suggests a proactive measure for defense rather than a permanent setup.

Reinforces its use as a verb related to the action of forming a defensive circle.

Commonly used to describe a nightly routine for security during expeditions or combat.

Stresses the temporary setup of defense until a more permanent solution is found.