Board Thread:Fleet's Prepared-ness/@comment-121.7.12.210-20170103142245/@comment-30949944-20170107040930

I don't understand the "can only go up one difficulty at a time" - you can switch difficulties, right? so say you clear E1 on easy, does that mean you will only be allowed to change between easy and medium on E2 map, although you can change between them as often as you like?