"You forget, Matsu-sama," Tomoe's tone was a little sharper than normal now, "that it is against Imperial Law for a Great Clan to wage war on a Minor Clan... and the Minor Clans who share borders with eachother to allow for warfare between them are relatively few. The Mantis have it by proxy of their naval power, and we saw how that went with their war against the Tortoise. The Hare and the Piranha share a border in theory because of the Shinomen... but well, waging war through that place would be crazy."
The sharpness was replaced by a teasing smile. "Perhaps you would consider it differently, had you spent time as part of a Minor Clan."