Multi-Mind Mayhem Volume 9: Isekai Tensei Soudouki (manga)

The time has come at last for Antrim, led by Bard, to battle the Kingdom of Haurelia. Antrim faces overwhelming odds, but Bard's knowledge of modern military tactics gives his outnumbered forces a fighting chance. Before the fight is over, however, Bard must go one-on-one in a battle to the death with Borodino, his most fearsome opponent yet. What surprising strategies will Bard employ against his deadly foe?