Conversation so far:
What happened in 1999?
On May 22, 1999, Hamm broke the all-time international goal record with her 108th goal in a game.
did she win any awards?
Her leadership and performance at the 1999 World Cup cemented Hamm as a soccer icon.

Question: who did she play for?
Self-contained rewrite: Who did Mia Hamm play for at the 1999 World Cup?