Almost every Ninja's cloth (mostly Jounin and chunin gear) have the Uzumaki clan (red-swirly circlish spiral) on their backs and I've been wondering why for a while now.
The clan sybol can be seen on the shoulders and the back of the Jonin Flak jacket.
Since the Uchiha and Senjuu clan founded the hidden leaf, one would expect that at least one of those clans symbol would be the trademark of the hidden leaf or maybe even a combination of the 2 clans symbol.
But rather they chose a clan that is affiliated with the land of eddies to be their symbol? What was the reasoning behind this.