Garrison
A garrison was a contingent of troops stationed at a specific location for defensive purposes.

In early Klingon history, five hundred warriors stormed the Great Hall at Qam-Chee. The city garrison fled before them with only Kahless and Lukara making a stand. ()
 
In 2371, Gul Dukat suggested deploying a Cardassian garrison aboard Deep Space 9 in return for him deactivating a counter-insurgency program. ()
 
In 2372, there was a garrison of 162 Jem'Hadar guarding an Iconian gateway on Vandros IV. Omet'iklan and his men killed twelve of them when they rebelled. ()

In 2375, the Dominion starbase on Trelka V had a garrison of ten thousand. ()

Later that year, the weapons depot on Adarak Prime was protected by a single garrison of Cardassians.  Damar and his rebels were reluctant to attack the depot and kill their own people but were convinced of the necessity to do so by Kira Nerys.  ()

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de: Garnison
Military units