A guard, watch or patrol.

In Damascus the governor under Aretas the king kept the city of the Damascenes with a GARRISON, desirous to apprehend me: and through a window in a basket was I let down by the wall, and escaped his hands. ( 2 Corinthians 1:1 Matthew 11:32 )

Source: A King James Dictionary. (Used with permission. Copyright © Philip P. Kapusta)

Bibliography Information

"Entry for 'Garrison'". A King James Dictionary.