gū​jūn​fèn​zhàn

fighting alone

孤军奋战 (孤軍奮戰) gū​jūn​fèn​zhàn
fighting alone idiom
a lone army putting up a brave fight against heavy odds

This unit continues to fight alone without any reinforcements.

struggling solo idiom
an individual or group working or struggling hard without any external support

He fought a lone battle in this company, completing the entire project development by himself.

Frequency

Movie subtitles
1.31 per million appears in 1% of films
Written text
0.559 per million

Sources

Definitions
CC-CEDICT