Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Events (hierarchy name)
4. events (activities)
5. armed conflicts

Anotations

Scope note:

Actions on the part of an army to surround or hem in a town, castle, etc., with a hostile force so as to cut off approach or escape in order to cut off all outside communication, and finally to take the town or castle.