The war will last...

[Loome]

I think that the war will last 5 days! Why? Because after almost(or even) the fourth day, everything has been arranged to get to a point: every important character in this war is leading/arrived already to the place Naruto is now.
2nd thing: Kishimoto has something with the number five when about time. Remember Naruto could use SM for 5 min and stuff like this.

 

[Simple Math]

yea most likely

 

[Cursed Prince]

lol, a 5 day war? pathetic

 

[Loome]

lol, a 5 day war? pathetic

Its been 4 days since the war started in naruto universe.
It looks like more because Kishi shows things that happen simultaneously in different chapters, and the arc extends to more, more chapters, making the reader think that its been months.

 

[KGB Kakuzu]

Wait how has it been four days?!!!!_ have they not been fighting for only one day/night cycle? Or are you including the three day prep time/ meet up at Kumogakure?

I'm certain this has been only the second day of combat yes?

Any ways if you do count the other days then I could see there being one more day, but it is more than likely at an end as Madara isn't about to just walk away from his two Jinjurikis he needs as well as the Jubi in the revival process

 

[DhattUchiha]

It's only been 1 full day, and now it's on the 2nd

 

[Eternal Moonless Sky]

It's really stupid to call this a "war", it's more like a one big battle.