Roman legion
Also known as: legio · legion · Roman legions · legions
- 1A Roman legion was composed of Roman citizens serving as legionaries.
- 2The manipular legion originally contained 4,200 infantry and 300 cavalry.
- 3Later Republican legions were structured into 10 cohorts.
- 4The first cohort was typically maintained at double strength.
- 5By the fourth century, legion sizes were reduced to units of about 1,000 men.
The Roman legion was the largest military unit of the Roman army, composed of Roman citizens serving as legionaries.
Connections1
Structural evolution
The reforms standardized the legionary structure, replacing the maniple system with the cohort as the primary tactical unit, which increased flexibility and combat effectiveness.
The Roman legion served as the primary and largest military unit of the Roman army, consisting exclusively of Roman citizens. Throughout the history of the Republic and the Empire, the legion underwent significant structural evolutions to adapt to changing tactical requirements and military needs.
Visual representation of the legion showing size and disposition for Infantry formationsWikimedia Commons: File:Legion_Task_ORG.pngDepiction of Roman legionariesWikimedia Commons: File:Roman_holiday_birthplace_of_rome_roman_soldiers-883133.jpg!d.jpgThe Roman Empire under Hadrian ( reigned "}]]}">r. 117–138 ), showing the legions deployed in its senatorial provincesWikimedia Commons: File:Roman_Empire_125.png During the Roman Republic, the manipular legion was organized with 4,200 infantry and 300 cavalry. Later, the structure was reformed into 10 cohorts, with the first cohort being double in strength, totaling 5,200 men. This configuration remained a standard for centuries, providing the backbone for Roman expansion and defense until the fourth century, when the military transitioned toward smaller, more flexible formations of approximately 1,000 men.