Jujitsu comes from a Chinese form of grappling. Probably something like Kenpo or some other Chinese martial art, and this is what the armies probably adopted for use rather than Wing Chun.
Myself and the whole of the world of martial historians eagerly look forward to your evidence of this!
its safe to say that I train some martial arts. Im not that good really, but most people really suck, so I feel ok about that - Sunfist