Conversation so far:
Did Duff McKagan play for Guns N' Roses?
In March 1985, Duff McKagan replaced bassist Ole Beich in Guns N' Roses.
What year did Duff McKagan start with Guns N' Roses?
In March 1985, Duff McKagan replaced bassist Ole Beich in Guns N' Roses.
Did Duff McKagan have to tryout for Guns N' Roses?
Did Duff McKagan enjoy success with Guns N' Roses?
With Guns N' Roses, Duff McKagan achieved worldwide success in the late 1980s and early 1990s.

Question: What country did the band have its most success?
Self-contained rewrite: What country did Guns N' Roses  with Duff McKagan have its most success?