Allagion

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Byzantine army
Structural history
East Roman army 'Classical' Byzantine army themes tagmata Hetaireia Komnenian-era army pronoia) Palaiologan-era army allagia Varangian Guard Generals Magister militum Domestic of the Schools Grand Domestic Stratopedarches Protostrator
Byzantine navy: Greek fire Dromon Admirals (Droungarios of the Fleet Megas doux)
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The allagion (Greek: ἀλλάγιον) was a Byzantine military term designating a military unit of 50-400 soldiers. It first appeared in the mid-to-late 10th century, and by the 13th century had become the most frequent term used for the Byzantine army's standing regiments, persisting until the late 14th century.