外海需人御 (外海需人禦) wàihǎi xū rén yù

wàihǎi xū rén yù phrase we must repel the foreign foe
Domain: Modern Chinese 现代汉语
Notes: From 五律·挽戴安澜将军 Five Character Regular Verse: Elegy on General Dai Anlan (Mao Zedong 2020, Illustrated Poems of Mao Zedong, trans. by Xu Yuanchon, p. loc. 552)