What's the difference between a war and a run-of-the-mill tough fight?

[punchr]

Ali-Frazier 3, war

Garcia-Herrera, tough fight

Trinidad-Vargas, war

De La Hoya-Quartey, tough fight

Castillo-Corrales, war

What characteristics make a war different than a regular tough fight?

[The Smash]

Sustained two-way action.

[punchr]

Sustained two-way action.

So fights like Barrera-Morales, right? Those dudes were really going at it. Your description really makes sense because a fight like Broner-Maidana is on the fence for me. It was a war for Broner but just a tough fight for El Chino. What are some fights you like that are wars?