Their acting commanding officer, Second Lieutenant Yoshiaki Iba, befriends and joins forces with Nagao Kagetora, the war leader of lord Koizumi.

Some make contact with the locals – one, Private First Class Mimura, even finds himself a consort who keeps following him – whilst others freak out, running away in a desperate attempt to return home, or rebelling against rules and restrictions and try to live as pirates.

Finally, his force shrunk from 21 men to 11, Iba manages to calm his troops by telling them that by fighting history and thus creating a time paradox they might be able to return home.

But their trust in their advanced weaponry costs them dearly: Shingen's forces outmanoeuvre them at every turn, the soldiers lose all their vehicles and major weapons, and five of them die on the battlefield.

The vehicles, including a tank and a helicopter, continue to run despite there being no replenishing fuel supply in the 16th century – a logical problem which was resolved in the remake.