Conversation so far:
what did Edward Canby do in the military?
Edward Canby was United States Army officer and a Union general in the American Civil War.
What part of the military was Edward Canby in?
Edward Canby was in the United States Army.
Was Edward Canby in the United States Army?
Edward Canby was a United States Army officer.
Anything else about Edward Canby's military career you can share?
As commander of the Pacific Northwest in 1873, Edward Canby was assassinated during peace talks with the Modoc.
Did Edward Canby receive any medals in his military career?
Where were some of Edward Canby's assignments?
Edward Canby was posted to command the Pacific Northwest
Did anything happen while Edward Canby was posted to command the Pacific Northwest?
Edward Canby soon faced problems with the Modoc tribe

Question: where did he serve most of his time?
Self-contained rewrite: Where did Edward Canby serve most of his time in the army?