Stingray, Triton and Sub Mariner fight each other and then fight Attuma.
Actually, S&T were just trying to get Namor to come to the surface world and prove he wasn’t a bad guy, but Namor punches first and asks questions later. Namor is basically The Hulk only less of a cave man. Slightly less.
How could a spoiled, prideful, impulsive guy with a huge temper ever become the ruler of an empire.
Oh, wait. (Gratuitous contemporary political reference!)
Creators: Roy Thomas and Sal Buscema
For the complete history of the MU, year by year, go here.