In the early days of Rome, military service was tied to land ownership. The army was made up of citizen militias, with each man providing his own weapons and armor. This system was similar to that of the Greek hoplites, where soldiers fought in close formations with shields and spears. However, as Rome expanded, it became clear that a more structured and permanent military force was needed. The influence of the Etruscans introduced elements of hierarchy and organization, while the Greeks contributed to Rome’s use of phalanx-style formations in battle. Despite these early influences, the Roman army continued to evolve, adapting to new threats and challenges.
The real transformation of the Roman military came during the late Republic, when Gaius Marius introduced the Marian Reforms. These changes allowed for the recruitment of landless citizens, shifting the army from a temporary force to a standing professional military. Soldiers were now equipped by the state, ensuring uniformity in weapons and armor. The structure of the army was also refined, replacing the older phalanx formations with the more flexible manipular and cohort systems. This allowed for greater maneuverability on the battlefield, giving the Romans a significant advantage over their enemies.