How many soldiers approximately make up a legion?

A Roman legion typically consisted of approximately 3,600 soldiers. This sizable unit was the backbone of the Roman military and was designed for both offensive and defensive operations. Each legion was organized into smaller subdivisions, such as cohorts and centuries, which facilitated effective command and control during battles. The legion's structure allowed for a high level of flexibility and adaptability in various combat scenarios, contributing significantly to Rome's military dominance during its expansion.

In contrast, the other options reflect much smaller numbers, which do not align with the historical context and organization of the Roman legions. A legion must be understood in its capacity to conduct large-scale military operations, which is why 3,600 soldiers is the accurate figure.