Why did the Romans stop using legions?

The legions just became the armies of local warlords, they had been made up of local forces more loyal to their local leaders rather than Rome for a long time (centuries). So in a sense they stopped to exist, in another sense they continued to exist, just under theoretically different high command.

When did Lorica Segmentata stop being used?

Around the middle of the third century the lorica segmentata fell out of favor with the Roman army. Although, it did remain in use during the Late Roman Empire. The armor was still around in the 4th century.

What was the last surviving Roman Legion?

Legio IX Hispana

Legio IX Hispana
Map of the Roman empire in 125 AD, under emperor Hadrian, showing the IX Hispana’s last attested location at Noviomagus Batavorum on the Rhine (Nijmegen, Netherlands)
Active	Before 58 BC to sometime in the 2nd century AD
Country	Roman Republic and Roman Empire
Type	Roman legion (Marian)

Did the Romans have armour?

The legionary of the Roman Empire had seen a number of style changes to the cuirass: the mail armor (lorica hamata), the scale armor (lorica squamata) of small metal plates, and the plate armor (lorica segmentata). Underneath the armor, for protection, he wore a padded garment, the thorumachus.

When did chainmail fall out of use?

The use of mail as battlefield armour was common during the Iron Age and the Middle Ages, becoming less common over the course of the 16th and 17th centuries when plate armour and more advanced firearms were developed.

How were the Romans able to overcome the navy of Carthage?

Rather than avoid their enemy’s area of strength, the Romans decided to confront them at sea. If they could defeat the Carthaginians at sea, then they could break their pride as well as their military might. Simply by investing heavily in warships, the Romans took the latter advantage away.