They can be recruited in the central Italian provinces Latium, Umbria, Etruria, Apulia, Liguria and Campania. These are the heartlands of the Res Publica, filled with our colonies founded during the epic struggles of the past centuries.
Rorarii are reserve skirmishers that are placed behind the Triarii in the legion's battle formation. They can be used to fill gaps and support wavering lines but they can’t be expected to hold whole sections of the battle line by themselves.
The Rorarii are armed with a hasta spear, javelins of the light Iberian gaesum type, and carry an early version of the scutum. They do not wear armour, but wear a helmet.
Historically, the roman infantry of the late 4th and early 3rd century BC was divided by wealth in two groups. Those with the lowest property classification for military service were fighting as light infantry, separated by fighting ability into the Leves, Rorarii and Accensi. The second, more wealthy group consisted of those fighting as heavy infantry, separated by their age and fighting ability into Hastati, Principes, and Triarii.
Every male roman had the duty to serve in the infantry for 16 years, or 20 years in the case of national emergency, until he had completed his 46th year of life. Excepting those rated high enough by the censor to be members of the ordo equester. Normally every roman must have served at least ten years in the military before he was permitted to hold any political office.