noun
Satchō Alliance
Historical term for the 1866 military and political alliance between the Satsuma and Chōshū domains, which played a key role in the Meiji Restoration.
薩長同盟は、坂本龍馬の仲介で成立した。
The Satchō Alliance was formed through the mediation of Sakamoto Ryōma.
Compound of 薩 (Satsuma domain) + 長 (Chōshū domain) + 同盟 (alliance).