Conversation so far:
when did Pat Tillman join the military?
Pat Tillman and his brother Kevin enlisted on May 31, 2002.
what did Pat Tillman do in the military?
Pat Tillman was an Army Ranger.
did Pat Tillman and his brother stay together?
Both Pat and Kevin Tillman were deployed to South West Asia as part of Operation Enduring Freedom.

Question: what did they do at fort lewis?
Self-contained rewrite: what did they do at fort lewis?