Board Thread:General Discussion/@comment-60.50.56.237-20150406023758/@comment-25283969-20150406122154

http://kancolle.wikia.com/wiki/Fatigue

In this wiki page everything is explained,read it again and again.

At some point you notice that sortie always deduct 15 moral after coming back to base.

There is even a table showing the differences in moral,read it.