A Roman soldier, known as a legionary, was a professional fighter in the ancient Roman army. They were typically Roman citizens and served for about 25 years. Equipped with armor, a gladius (short sword), and a scutum (large shield), they were trained in various combat techniques and formations, such as the famous testudo or tortoise formation. Roman soldiers played a crucial role in expanding and protecting the Roman Empire. They built roads, forts, and other infrastructure, helping to maintain order in conquered territories. Their discipline and organization were key factors in the military success of Rome throughout its history.