The scouts from Kiri had received their orders, and when the conditions were met and no news came from Valen to the contrary, they followed through. The Land of Rain had been left undefended, so the troops sent from Kiri went in and took over with no resistance. There was no fighting and it went off without a hitch. They went around and looked for any traps needed to be disabled, but it didn't look like it was that difficult of a thing.
Konoha had not bothered to pay their shinobi, and when that happened, the guards all just left. Because of this, the minor nation was full undefended, and the condition was met for Kiri's troops to come in and claim the territory.
Konoha had not bothered to pay their shinobi, and when that happened, the guards all just left. Because of this, the minor nation was full undefended, and the condition was met for Kiri's troops to come in and claim the territory.