What month and year did the 30 Month War end ?
1866 ( " Keiō 2 " ) : " Goryōkaku " completed September 28 , 1866 ( " Keiō 2 , 20th day of the 8th month " ) : Shogun Iemochi died at Osaka ; and the bakufu petitioned that Hitotsubashi Yoshinobu should be appointed as his successor .