Garrison

The garrison was forced to surrender.

The garrison saw no choice but to surrender.

The UK asserted its claim to the islands by establishing a naval garrison there in 1833.

The enemy is trying to establish a puppet garrison state in the territory they occupied.

My Lord the great Commander of the worlde, […] Hath now in armes ten thouſand Ianiſaries, […] And for the expedition of this war, If he thinke good, can from his garriſons, UUithdraw as many more to follow him.

For a time, it was the only Royalist stronghold between London and Exeter, but it fell at last when a member of the garrison turned traitor and admitted the Parliamentary besiegers who destroyed it with gunpowder.

“I came down like a wolf on the fold, didn’t I ? Why didn’t I telephone ? Strategy, my dear boy, strategy. This is a surprise attack, and I’d no wish that the garrison, forewarned, should escape. …”

Nor was he content with thus strongly garrisoning the fort, but he likewise added exceedingly to its strength by furnishing it with a formidable battery of quaker guns—rearing a stupendous flag-staff in the centre which overtopped the whole city—and moreover by building a great windmill on one of the bastions.

'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