Shinobi-iri
Encyclopedia
are ninjutsu
Ninjutsu
or may be:*the arts associated with espionage and assassination in feudal Japan, see Ninja*modern schools of martial arts claiming to be based in these traditions, see Modern Schools of Ninjutsu*fictional depictions, see Ninja in popular culture...

 techniques for silent movement and climbing for covert infiltration
Infiltration tactics
In warfare, infiltration tactics involve small, lightly equipped infantry forces attacking enemy rear areas while bypassing enemy front line strongpoints and isolating them for attack by follow-up troops with heavier weapons.-Development during World War I:...

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