Board Thread:Game Updates/@comment-3502824-20180328015558/@comment-27999059-20180423135405

五周年任務【伍：五周年艦隊出撃！】: Use the fleet including 1 CL class and 2 DD/kaiboukan to complete one of following conditions: 1. S rank in 2-1 to 2-5 boss node once. 2. S rank in 5-3 and 5-5 boss node once. 3. S rank in 6-5 boss node once.

So wait, you only need to complete one of these? So either S-rank 2-1 to 2-5, or S-rank 5-3 and 5-5 or S-rank 6-5? Wow that is actually an interesting quest! Chapeau!