Conversation so far:
When did John J. Pershing report for active duty?
John J. Pershing reported for active duty on September 30, 1886.
When did John J. Pershing participate in Indian campaigns?
While serving in the 6th Cavalry, John J. Pershing participated in several Indian campaigns

Question: Did Pershing participate in the Wounded Knee massacre?
Self-contained rewrite: Did John J. Pershing participate in the Wounded Knee massacre?