IPA: /kæˈzɜrn/
KK: /kæˈzɜrn/
A building or group of buildings where soldiers live and are trained.
The soldiers returned to the casern after their training exercises.
Casern comes from the French word *caserne*, meaning a military barracks or lodging. The term is derived from the Italian *caserna*, which is a diminutive of *casa* (meaning house).
Think of a 'house' ('casa') where soldiers stay — that's what a casern is, a place for military lodging.