Kagerō Village

, introduced in the anime, was a small village located in the Land of the Mountains. Thirty years before the series begins, it was at war with Konoha. After a surprise attack by Konoha, they declared a cease-fire. Two weeks later, however, another rival village wiped them out. Only Gennō, who had been in Konoha at the time planting explosive tags for a possible counter-attack, survived its destruction.

Trivia

 * Despite being a shinobi village, it is never called Kagerōgakure, as is the case with all other shinobi villages.