The Cult
Mars's cult was state machinery. His oldest priests were the Salii, two colleges of twelve dancing warriors — the Salii Palatini on the Palatine, the Salii Collini on the Quirinal — who carried the twelve ancilia through the city through March, leaping in armor to a song older than Latin's literature. His spear stood in the Regia, moved by the state when war began; his oldest temple rose in 388 BC; and the Campus Martius outside the pomerium was consecrated to him as the mustering field — only the war god's ground could hold an army inside the city's sight. His festivals trace the agricultural year he guarded: the Feriae Marti opened his month on March 1, the Equus October sacrificed the October Horse on the Ides, and the Mamuralia — the old man driven out and beaten with sticks on the day after the Ides of March — was read even in antiquity as the expulsion of Mamurius, the smith of the shields. Farmers purified their fields before him (Cato, De agricultura 141), and the Arval Brethren sang his name in their grove hymn. No Roman god was busier, and none less optional.


