The Armilustrium was a Roman religious observance held on the Aventine Hill where soldiers purified their arms through ritual and chanting before storing them for winter, signifying the close of the campaigning season. Dedicated to Mars, it reinforced the link between martial prowess and civic order. Though rarely detailed in surviving texts, in poetry it appears as a symbol of seasonal transition, the cessation of violence, and the return to domestic peace—often contrasted with spring festivals of war, offering a cyclical view of Roman civic and military life.

Armilustrium (October 19) was a Roman festival where weapons were purified and stored for winter, honoring Mars; it marked the end of the military campaigning season and involved processions on the Aventine Hill; poets may use it to symbolize transition from war to peace, the ritual cleansing of violence, or seasonal closure—useful in elegies or martial poetry reflecting on the cost of conflict.