Strange Formation is the 725th chapter of the Kingdom manga.
Summary[]
Kan Ki uses the formation to buy time by having only a few positions where soldiers of the Kan Ki Army and the Ri Boku Army met without being flanked. Ri Boku doesn't attack the whole formation as he is too cautious to attack a formation unknown to him with full force. While the ends of his cross-fight Kan Ki send test how Zhao commander react if he marches Unit in direction of them. As the sun sets Kan Ki bought enough time that darkness falls, and he gathered enough information and changes now the formation.