Meanwhile, the focus of Japanese politics shifted to Kyoto, where the major struggles of the time occurred. The shogunate entrusted Satsuma and Aizu with the protection of the Imperial court, against attempts of the "Sonnō jōi" faction to take over, as in the Kinmon Incident of 1864. The shogunate decided to punish Chōshū for this event with the First Chōshū expedition, under the leadership of a Satsuma retainer, Saigō Takamori. Saigō, however, avoided a military conflict and allowed Chōshū to resolve the issue with the Seppuku of the three perpetrators behind the attack on the Imperial palace.