battle cry
noun [ C ] uk/ˈbætəl ˌkraɪ/ us/ˈbæt̬.əl ˌkraɪ/
（作战时的）呐喊，喊杀声
a shout given by soldiers as they run towards the enemy
（某项事业的）口号，标语
a phrase used by people supporting a particular cause
"Reclaim the night" was the battle cry of women fighting for the right to walk safely at night. “还我夜晚”是那些争取能够在夜间安全行走权利的妇女所喊出的口号。