Taken from these examples of opinions of Saigo and Okubo, the object of 'the expeditionary force to the east' was not only to seize Edo-jo Castle, but also in punishing Yoshinobu TOKUGAWA (and his supporters, Katamori MATSUDAIRA, and Sadaaki MATSUDAIRA).
このように、東征軍の目的は単に江戸城の奪取のみに留まらず、徳川慶喜（およびそれに加担した松平容保・松平定敬）への処罰であった。