Lochagos (Greek:Λοχαγός; abbreviated as Λγος) is used in the Greek language to mean "Captain". More precisely, it means "leader of a lochos".
Ancient Use
The term has been used since the times of Ancient Greece, where the place of the rank in the military hierarchy differed from city-state to city-state. For example, Xenophon reported that a lochagos of Sparta served under a polemarch. Aristotle reported that his counterpart in Athens served under a taxiarchos. In military manuals, the file is often called a lochos and as such its leader is also called a lochagos. Thus, the lochagos can also be the promachosprotostates.
The rank of lochagos could also represent an officer roughly equivalent to that a Roman armycenturion. The term was however also used by later writers to describe the civilian leader of a curia. The rank was still in use in the military of the Byzantine Empire.