In this period, many Byzantine armies were dominated by mercenaries as the empire tended to have lots of money and only a few trained soldiers. Also, they had so many enemies that they would typically appease one faction with a temporary alliance (and lots of money) to fight a new campaign against another faction.
The core of the army were the Thematic divisions - standing units of foot soldiers from each imperial province. Another permanent unit were the Varangian guards who acted as the imperial bodyguards.
I have tried to reflect some of this here.
Thanks for looking.
Norman mercenary cavalry:
![Image](https://live.staticflickr.com/65535/49806596083_01efc3242e_z.jpg)
Pecheneg mercenary horse archers:
![Image](https://live.staticflickr.com/65535/49806595888_4c113b63f7_z.jpg)
Seljuk mercenary cavalry (surprising, I know! But they did fight in the Balkans against the Frankish incursions):
![Image](https://live.staticflickr.com/65535/49806595733_cd68bde256_z.jpg)
Nobles and their household:
![Image](https://live.staticflickr.com/65535/49806595543_9cdbbf3519_z.jpg)
Varangian guards (front) and Anatolian (or Armenian) levy:
![Image](https://live.staticflickr.com/65535/49807151151_7ff55b8bc2_z.jpg)
3x Thematic infantry divisions:
![Image](https://live.staticflickr.com/65535/49807150936_738ecf80d3_z.jpg)
Finally, some action shots from Manzikert:
![Image](https://live.staticflickr.com/65535/49807150516_03845e882a_z.jpg)
![Image](https://live.staticflickr.com/65535/49807150766_f7c22f6e73_z.jpg)
![Image](https://live.staticflickr.com/65535/49806594448_2c4cbd557b_z.jpg)