What is a group of 100 soldiers called?

What Is a Group of 100 Soldiers Called?

When we think of military units, terms like "platoon" or "company" come to mind—but historically, one of the most influential formations was the century, a group of about 100 soldiers in the Roman army. The name comes from the Latin word centuria, derived from centum, meaning one hundred.

This unit was central to the structure of the Roman legion during the early Roman Republic, which began in 509 BCE. Legions were divided into smaller, more manageable groups, and the century was a key building block. While the exact number could vary—sometimes closer to 80 men—the idea of a hundred-soldier unit persisted.

Leading each century was a centurion, a seasoned officer respected for discipline, bravery, and tactical skill. Far from being just a number, the centurion was the backbone of Roman military leadership, often rising through the ranks based on merit rather than birth. Their authority helped maintain order and effectiveness on the battlefield, making the Roman army one of the most formidable forces in history.

The legacy of the century lives on, not just in military history, but in language. The word "century" now commonly refers to a period of 100 years, but its roots are firmly planted in the ranks of ancient Roman soldiers. Even today, the idea of a tightly organized unit of around 100 troops echoes in modern military doctrine, a testament to Rome’s lasting influence.

So, a group of 100 soldiers isn’t just a number—it’s a piece of military tradition that helped shape empires.