I'm trying to get the "three musketeers" achievement. I have three musketeers standing together. I tried it in a small triangle. I tried it in a row. What is the trick to getting this? I took the entire Honor tree. There is a great general standing with them too. I have taken cities and units with this formation. Is this achievement bugged? If anyone got the "three musketeers" achievement ... please tell me the secret.