| Ninjutsu may help, conceptually, in stealth-based, close proximity situations; Infiltration.
It is not a "tough guy's" martial art, nor is it a sport.
Ninjutsu is dirty, fast, and simple.
With that said, I would think that any extra training would help a soldier in a combat situation.
13th, from what I've read and watched about Krav Maga, it is somewhat similar to Ninjutsu.
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