posterioreihin

Posterioreihin is a term used in ancient Roman military contexts, specifically referring to the rear guard of an army formation. The primary function of the postereirei was to protect the main body of troops from attacks coming from behind or to secure their retreat if necessary. This unit played a crucial role in maintaining formation integrity and preventing disorder during marches, battles, or when encamped. They were also responsible for scouting the rear, ensuring no enemy units were shadowing the army, and often acted as a deterrent against ambushes.

The composition and strength of the postereirei could vary depending on the size and nature of the military campaign. Typically, they would consist of experienced soldiers, often cavalry, who could react quickly to threats. Their presence was a vital element of Roman military discipline and strategy, emphasizing the importance of security in all aspects of movement and combat. The effectiveness of the postereirei contributed significantly to the overall success and survivability of Roman legions.