Hello friends and all others, 
I wandered long time what if...
So, what if battle can be different duration, not 24 hours? 
I think 24 hours is long enough. Will be good if we have chance to reduce this time.
For example, if defending side have more than 50% damage for 5 minutes, duration of the battle reduced with 1 minute.
It is possible duration of the battle to reduce faster if damage is bigger, like 60 or 70%. 
If attacking side have more than 50%, time of the battle going slowly back to 2 hours. 
Or Attacking and Defending side can choose to reduce or enlarge the duration. 
This gonna give us more interesting game, more flexibility. 

What do you think?