Primarily used to describe places related to the armed forces, not civilian spaces. The general made his headquarters in the cantonment.
Pro Tip 2/3
Not Permanent
Suggests a temporary setup, which can be dismantled, unlike a permanent military base. Once the training concluded, the cantonment was disassembled.
Pro Tip 3/3
Historical Context
Can have a colonial or historical connotation, as cantonments were set up in foreign territories. The old cantonment bore marks from the era of colonial rule.