Legion - Vine's Expository Dictionary of New Testament Words
Legion[ 1,,G3003, legion ]
otherwise spelled legeon, a legion," occurs in Matthew 26:53, of angels; in Mark 5:9, Mark 5:15, and Luke 8:30, of demons. Among the Romans a "legion" was primarily a chosen (lego, "to choose") body of soldiers divided into ten cohorts, and numbering from 4,200 to 6,000 men (Gk. speira, See BAND). In the time of our Lord it formed a complete army of infantry and cavalry, of upwards of 5,000 men. The "legions" were not brought into Judea till the outbreak of the Jewish war (A.D. 66), as they were previously employed in the frontier provinces of the Empire. Accordingly in its NT use the word has its other and more general significance "of a large number."