mods and rockers had different tastes in clothing, culture and music.

mods and rockers fought each other because they were rival gangs.

They were considered "R&B mods".

The easiest way to explain what the mods were is to watch the film Quadrophenia 1960s Mods & Rockers film

The fights at Brighton pier certainly didn't have a referee! Mods have sort of died out now, and so have rockers, who have been replaced with punks. Most probably the rockers have won, though we will never know for sure.