Talk:Expedition/@comment-84.134.67.29-20140305160527/@comment-24348385-20140305174554

did you have any light cruisers other than that CLt? If so, then that explains it - CLts don't count towards the fleet requirement regarding light cruisers. So, if you send out a fleet composed of 1 CLt and 3 DDs to an expedition that requires 1 CL and 3 DD, you will fail the expedition. It's mentioned in the bullet points at the beginning of the Conditions section of this article.