In Roman terminology, what does a 'legion' signify?

A 'legion' in Roman terminology refers to a significant military unit that typically consisted of around 3,600 soldiers. This size allowed the legion to be a versatile and formidable force on the battlefield, capable of conducting various military operations. The structure of a legion was well-organized; it included several cohorts, each made up of smaller groups called centuries.

A legion's composition enabled it to deploy effectively during battles and adapt to different combat scenarios. Understanding the size and organization of a Roman legion is essential in comprehending the military strategies and capabilities of ancient Rome, as these legions played a central role in the expansion and defense of the Roman Empire. Other options representing smaller units do not align with the historical context of what a legion truly comprised.