die Garnison
garrison town / base
The location or town where military troops are permanently stationed.
Potsdam war eine bedeutende preußische Garnison.
Potsdam was an important Prussian garrison town.

garrison
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garrison town / base
The location or town where military troops are permanently stationed.
Potsdam war eine bedeutende preußische Garnison.
Potsdam was an important Prussian garrison town.

The word 'Garnison' (garrison) belongs to military terminology and is also used in historical contexts. It is rare in everyday language.
Die Stadt war früher eine wichtige Garnison für die Armee.
The town used to be an important garrison for the army.
Whether the place or the troops are meant can be recognized from the context. If the 'Garnison' (garrison) does something (e.g., fights), the troops are meant. If it is a place (e.g., in a town), the location is meant.
Die Garnison wurde in Alarmbereitschaft versetzt.
The garrison was put on alert.
In connection with the location, 'Garnison' (garrison) is often used with the verbs 'stationieren' (to station) or 'dienen' (to serve). You say that soldiers are stationed in a garrison or serve there.
Die Truppen sind in einer Kaserne am Rande der Garnison stationiert.
The troops are stationed in a barracks on the edge of the garrison town.
location / site
'der Standort' and 'die Garnison' can both mean a place where someone or something is located. 'Standort' is general and fits people, companies, buildings, or devices. 'Garnison' belongs to the military. It can mean the town or place where troops are permanently stationed, or the troops themselves. The words can be confused because a garrison is also a location. But not every location is a garrison. Without a military context, 'Standort' is the right word.

Die Garnison am Stadtrand wurde nach vielen Jahren geschlossen.
The garrison on the outskirts of the city was closed after many years.
Der neue Standort der Firma liegt direkt am Bahnhof.
The company's new location is right by the train station.