A Roman centurion

The video introduces Marcus Alexius Gallant, a Centurion in charge of 80 legionaries. He describes his military attire, including a tunic, braccae, and lorica hamata, along with a cingulum, pugio, and gladius. He highlights his shin protection, known as ocrea, and his medals. The Centurion explains the importance of his helmet's transverse crest for visibility in battle, contrasting it with the optio's crest orientation.

What is the significance of the medals worn on a Centurion's chest?

Who is the second-in-command to a Centurion?