Volume 6B, School Rules 𝐟re𝐞w𝐞𝒃𝓃𝒐𝐯𝚎𝒍.c૦𝚖 Article 221
 - Based on Article 10, when a war or any other action that will wear down a nation’s power coincides with an emergency or a planned history recreation, it is possible to replace it with duels by representatives to avoid the possibility of inadequate personnel or preparation.

Volume 6B, School Rules

Volume 6B, School Rules 𝐟re𝐞w𝐞𝒃𝓃𝒐𝐯𝚎𝒍.c૦𝚖 Article 221 - Based on Article 10, when a war or any other action that will wear down a nation’s power coincides with an emergency or a planned history recreation, it is possible to replace it with duels by representatives to avoid the possibility of inadequate personnel or preparation.

Kyoukai Senjou no Horizon

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