...My understanding of Marishiten worship, for example, is that she was invoked to provide stealth - so that trouble would pass over and not visit the devotee. And if trouble should find you, that it could not "bind" you. For me this shows the maturity of actual professional warriors who live in uncertain times and regard their job as maintaining peace as opposed to succeeding in war.
David A. Hall, in his dissertation Marishiten: Buddhism and the warrior Goddess
argues that the cult of Marishiten provided the warriors more combative traits than 'invisibility'.
Edit: In my previous post "skilled troops deployement..." should read "skillful troops deployement..."