What is a…
Greek: λεγεών —transliteration: legión
The Greek version of the Latin word “legion” (legio, legionis, legiuncula) appears 4 times in the New Testament.
A legion originally consisted of 3,000 men, and later 5,200 men. By the time of Christ it was 6,000, not counting its horsemen ( equites ), who were perhaps a 10th or less the number of foot soldiers. In later years, the size of a legion became much smaller (1 to 1½-thousand).
The word is used in Matthew 26:53 to express 72-thousand angels.
In Mark 5:9 it is used to simply express a great multitude of demons.