garrison

A permanent military post.

The troops stationed at such a post.

(allusive) Occupants.

(U.S. Space Force) A military unit, nominally headed by a colonel, equivalent to a USAF support wing, or an army regiment.

To assign troops to a military post.

To convert into a military fort.

To occupy with troops.

“'Establishing a land bridge through Mariupol to Crimea would take tens of thousands of troops. So would garrisoning eastern Ukraine.', http//www.economist.com/news/briefing/21615605-now-willing-use-russian-troops-more-or-less-openly-eastern-ukraine-vladimir-putin-has”