臨戦態勢をとるを英語でなんと言うか？

on a war footing と言います。0:01 North Korean leader Kim Jong Un has declared the country's front-line troops on a war footing, after tensions with South Korea soared following an exchange of fire at the border. 金正恩（キムジョンウン）第１書記は各前線部隊に臨戦態勢をとるように命じた。

Pyongyang threatens military action over Seoul's border broadcasts
https://www.youtube.com/watch?v=u3-VYjLaDMk  0:40 Lindsey Graham laying down a hawkish challenge for other candidates to get on a war footing. リンジー・グラハム上院議員は他の大統領候補たちに戦争について真面目に取り組めと発破をかけた。
See highlights from GOP 'happy hour' debate
https://www.youtube.com/watch?v=aYKFh7jBNWs  10:38 China and Japan look like they're gonna go on a war footing 日本と中国はドンパチやらかしそうだ。
US ECONOMY COLLAPSE WILL LEAVE MILLIONS IN POVERTY

練習問題解答
a-2357 move to a war footing
b-4549 on a war footing