Zhànzhēng niándài cuīshēng le wúshù yīngxióng zhǔyì gùshi.
Wartime gave rise to countless stories of heroism.
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英雄主义 can carry both positive (brave self-sacrifice) and subtly critical connotations in Chinese. In left-wing political contexts it can suggest reckless individualism, while in pop culture and wartime narratives it is celebrated.