Can I use commands blocks to change if you can be attacked or not?

Question

I am making a map and I want to have most of having the players not being able to attack each other, but there is a part of the map where I want the players to attack one another. Is there a way to have the commands change if you are able to or not to attack others? 

 

-LovesAnime

Answer 1

Probaly, check on the  here to see if other people have asked the same