I don't think Buddhism as we currently know it is old enough to have gone through this particular phase, though it's had its own share of warriors in the past.

Interesting statistic. Actually Buddhism would have been 1500 around the year 1000 AD. I don't know what was going on, but then it had a lot more competition from Taoism and Confucianism. Further it tended to adopt the indigineous beliefs a lot more readily than many other religions. There is even the Lotus Sutra which justifies using the superstitions of people to lead them towards enlightenment. (Sort of a Buddhist version of lying for God) Its been a while since I read it, but I seem to recall the metaphor of telling kids in a burning house that there is candy outside.

Now the form of Buddhism that reached Japan did swiftly get tied into its military views. But there also was strong native Japanese beliefs. Further they already were pretty militant.

My own belief is that militants tend to use religion as one more propaganda point rather than religion uses the military.