Viking Hirdmen (heavy infantry mustered from the wealthier members of Viking society) likely of the 900-1100 CE.
SPAIN / Medieval - Visigoths horseman
The sea walls of Constantinople and a Byzantine ship armed with a Greek fire projector c. AD 1000
VI - IX century invaders of the remains of the western and eastern Roman empires and Byzantium.
Sassanid Persian royal hunt, 6th cent. A.D.~ by Angus McBride
The Wandering Folklorist
The Byzantine's military was organized to defend the empire. "Troops were recruited locally and given land in return for service. Outsiders, especially Slavs and Armenians, accepted similar terms. Over time, hereditary military leaders developed regional power and displaced aristocrats who were better educated. The empire socially and economically depended on Constantinople's control of the countryside." (From chapter 9 outline)
This illustration depicts some of the various troops of Hannibal's army in Rome. Libyan javelineers mostly with a Samnite/Italian ally second from the left, an Iberian, possibly from the Baeleric islands and a Celtic standard can be seen in the left background.