Talk:Company of Champions/@comment-173.87.151.105-20140405151253/@comment-24549931-20140414034817

To give a definitive answer, no you do not need to join. The only reason you haven't gotten the achievement/trophy is because this covenant is the only one that has 3 "are you sure you want to join?" prompts and you have to say yes to two of them. On the third prompt, the achievement/trophy will unlock.