Conversation so far:
What happened in Canby's early military career?
Canby served in the Second Seminole War in Florida and saw combat during the Mexican-American War.
What was Canby's rank in the military?
where he received three brevet promotions, including to major for Contreras and Churubusco, and lieutenant colonel for Belen Gates.

Question: What did Canby do in the Mexican-American war?
Self-contained rewrite: What did Edward Canby do in the Mexican-American war?