domestikos ton scholon
Commander of the regiment of scholae. The first officer with this title appears in 767/8. In the 10th C the domesticos became very powerful among the army of the themata; in mid-10th C the office was divided in two, domestikoi ton scholon of the East and those of the West, commanders in chief of the eastern and the western provinces´ army respectively.

doukas (lat. dux)
Antiquity: Roman military commander who, in some provinces, combined military and civil functions.Buzantium: a higher military officer. From the second half of the 10th c. the title indicates the military comander of a larger district. After the 12th c., doukes were called the governors of small themes.

katepano
(from "epano","above") Governor of a katepania. Title that from the end of the 10th century characterized the commanders of large provinces as Italy or Mesopotamia and from the 11th century, it was used also in the regions of Bulgaria, Antioch etc.

logothetes tou dromou
Administrative Byzantine title. Initially official in charge of the public post. From the 7th C he acquired a new role and his responsibilities included ceremonial duties, protection of emperor, general supervision of diplomatic relations and collection of political information.

strategos ("general")
During the Roman period his duties were mainly political. Οffice of the Byzantine state´s provincial administration. At first the title was given to the military and political administrator of the themes, namely of the big geographic and administrative unities of the Byzantine empire. Gradually the title lost its power and, already in the 11th century, strategoi were turned to simple commanders of military units, responsible for the defence of a region.