In the army and air force, these names are often based on the unit or post that a holder of each rank usual commands.
For example, a tagmatarchis is in charge of a tagma, which is derived from an Ancient Greek word translatable as "command", "order", or "class", and in modern Greek is a unit equivalent to a battalion in other armies; hence a modern tagmatarchis is a rank equivalent to major in other armies.
Similarly, a lochagos normally commands a lochos (a word that originally meant "warband"), which in Ancient Greece was a 100-strong hoplite unit, but in modern Greek usage is equivalent to an infantry company.
The suffixes -agos and -archos (or -arches), which are often found in Greek rank names, are derived from the roots agein "to lead" and archein "to rule", respectively.
Its insignia are based on the British Royal Air Force, while it uses Army rank titles when translated to English.