The troopers saw action contesting Stonewall Jackson's cavalry in the Valley Campaign.

Entity and relation annotations:
id: 0
type: entity
value: text: the Valley Campaign
labels: <Event>
id: 1
type: entity
value: text: Stonewall Jackson's
labels: <Person>
type: relation
to_id: 0
labels: Person:participates_in:Event
from_id: 1