On a smoke-filled battlefield in 1868, a 16-year-old girl carried the severed head of her 21-year-old sister away from the front lines. Nakano Takeko had asked for that beheading herself, so the enemy could never claim her head as a trophy.

This deep dive looks past romanticized samurai myths to a highly educated noblewoman who refused the limits placed on her by the military brass and formed her own unsanctioned frontline militia.

• A decade-long childhood curriculum blending Confucian classics, calligraphy, and lethal combat
• Rejecting an arranged marriage during national unrest as a deeply subversive act
• Mastery of the naginata polearm, which she taught to women and children at Aizu
• Forming the rogue Joshitai after Aizu leaders forbade women from the official army
• Exploiting enemy hesitation to attack women, then her final act of defiance on Yanagi Bridge