Legionary Organization
The basic formation of the Umbrian Republic Army, the legion is a unit of ten thousand soldiers which is considered large enough to allow for independent tasking and assignment. A legion's equipment will vary based on the type of legion and its specific mission parameters. It may also be augmented with independent sub-units which provide specific support functionality.
The Legionary structure is made up of twenty cohorts of five hundred legionnaires each. Each of these is led by a Primus, and the Primes themselves are ranked in four bands. The combination of bands and seniority distinguish amongst the Primes, and the Legion's commanding officer, or Legate, will often delegate command of groups of cohorts to the highest-ranking Primes.
Each of the cohorts in turn is made up of five centuries of a hundred soldiers. These centuries are led by centurions, who are ranked within their cohort based on length of service, rather than band or other official designation of seniority.
There are several different types of legions, but the vast majority are mobile infantry formations, where the legionnaires fight as infantry, but are supported with sufficient transport capabilities to provide mobility on the battlefield.
Other types include cavalry legions, which are equipped with fast armored fighting vehicles and air assault elements, and armored legions, which are split evenly between armored infantry and tank cohorts. Still more legions specialize in specific types of operations, such as low gravity combat or for warfare in specialized terrain.
Cohorts within each legion can also be made up of specialized soldiers and are often used to provide particular functionality to the legion as a whole. While the flexibility these unique cohorts provide is well recognized, no more than five of the legion's cohorts are allowed to be made up of those specialized troops, less their prevalence limit the legion's effectiveness at its primary mission.
Additionally, one of the twenty cohorts is traditionally designated as a headquarters unit for the Legion. This cohort contains a higher percentages of officers and specialists, and retains only two of its centuries in their traditional mobile infantry role to provide security for the headquarters. The rest of the soldiers serve in administrative functions to support the legion overall.
Finally, to increase the flexibility of the legionary structure, additional military units can be assigned to the legion for its use. This is done at the behest of the army group commander, who retains a small number of independent units which can be used at their discretion. These units are traditionally structured at the cohort level, and include artillery and armor cohorts as well as support functions such as logistics and hospital units.