Speaking of rivalries, you missed 63e vs half of NA. Like 10 reg leaders came into the ts and delivered Karth a list of demands or whatever and then boycotted the 63e
aside from that you had some regiments made almost exclusively of 63e poach-ees that we were told to ban on sight if they came on the ts or the 63e servers. Plus Karth boycotting NANWL because he wanted to throw a temper tantrum. I could go on but you get the idea. Not a typical rivalry like you have listed but definitely one of the biggest rivalries of the last few years.