By American military you mean the ArmyEvery American war. 1 out of 3 for blue on blue is not a good statistic.
It's well known over here that the American military are more trigger happy and more likely to commit "friendly fire".
And that's not a fair statement imo. I have to disagree highly that after OIF III when Iraq wasn't a living hell on earth, the Marines I worked with and around were very very very restrained.