It is known that sport fans played a prominent role in Byzantine politics. Initially there were four teams: the greens, the reds, the whites and the blues. But later the reds and the whites were absorbed, so the main contention was between the greens and the blues.
The enmity between the teams was so high that they had separate sectors of the city's wall to defend in case of a war. Various emperors were supported by different teams, and many coups were staged out of this strife.
I wonder whether there was any other state in history where the sports fans influenced politics to a similar degree?