When 2 of my roosters got in a fight, I didn't know what to do since I got them that day and they were feral. They were free rangeing. After that fight those two became friends, lol.
Wow, least you were home when this happened. I had 3 roosters and four hens ( This is before I knew anything about chickens ). I went out they were all fighting one ran away and only came back home once and the other to keep there distance.