Board Thread:Questions and Answers/@comment-71.206.165.125-20131022195402/@comment-409884-20131024135615

How accuracy is calculated I can not answer - you may want to ask on the forums for your particular server.

As to the last part

This is a partial answer as there are other contributing factors involved in battle. Moral will play a partial part/role in the battle. When moral gets to 0 the battle will end.