The Eastern Company aimed to join forces with the army of Prince Ninnajinomiya, the Seito Taishogun (the supreme commander temporarily appointed to destroy the shogunate), at Osaka, but their attempts to do so did not succeed; moreover, they acquired the nickname the 'Shinpeigumi' (Company of Imperial Soldiers) and tried to attain the role of guarding the palace as imperial guardsmen, but the fighting ended before they ever organized themselves into an effective unit.
大坂の征討大将軍仁和寺宮の陣に合流を目指したが上手くいかず、更に「親兵組」と称し御親兵として御所警衛にあたることに拘ったが最後まで不調のまま終った。