The ancient Romans were a big group of people who lived a long time ago in a place called Rome. They had a group of people called the military that they used to protect their city and fight against other groups of people when they needed to. The military was made up of special soldiers called legionaries, who were trained to be very brave and strong.
The military of ancient Rome was organized into different groups depending on what they were good at doing. There were soldiers who were good at fighting on horseback, soldiers who were good at throwing spears, and soldiers who were good at using swords.
The soldiers in the military wore special armor to protect themselves during battles, and they carried weapons like swords, shields, and spears. They also had to practice a lot so they could be really good at fighting.
One of the most famous parts of the ancient Roman military was something called the Roman Legion. This was a group of soldiers who were known for their discipline and bravery. They were organized into groups of about 5,000 soldiers, and they were led by special commanders called centurions.
Overall, the military was very important to the ancient Romans because it helped them protect their city and keep it safe from other groups of people who wanted to take it over. The military also helped the Romans conquer other lands and expand their empire.