Yasuki War (TCG)

The Crane-Crab War was the first interclan war in the Emerald Empire.

Yasuki Defection
The Yasuki family, chafing under the demands of the haughty Crane Clan, broke its ties with the Crane and offered fealty to the Crab, who eagerly accepted.

Aftermath
The war led the Emperor to forbid direct warfare between the Great Clans.