Conversation so far:
Where did Buffalo Springfield first begin their career?
in Thunder Bay, Ontario.
Who were the members?
Neil Young and Stephen Stills met in 1965, at the Fourth Dimension in Thunder Bay, Ontario.
Where did the name come from?
The group's name was taken from a brand of steamroller made by the Buffalo-Springfield Roller Company.

Question: When did they make their debut?
Self-contained rewrite: When did Buffalo Springfield make their debut?