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loyalty to the emperor
幕末に勤王の志士が立ち上がった。
At the end of the Edo period, loyalist warriors rose up.
勤王の旗を掲げて戦いに臨んだ。
They went into battle under the banner of imperial loyalty.
勤王派と佐幕派の対立が激化した。
The conflict between loyalists and shogunate supporters intensified.