Translation of "the front line" - English-Spanish dictionary

the front line

noun uk /ˌfrʌnt ˈlaɪn/ us /ˌfrʌnt ˈlaɪn/

a place where opposing armies face each other in war and where fighting happens

la primera línea
Tens of thousands of soldiers died on the front line.
More front-line troops will be flown to the battle zone over the next few days.

(Translation of “the front line” from the Cambridge English-Spanish Dictionary © Cambridge University Press)