不惜一战

to be ready to go to war

no; not so / (bound form) not; un-

not stint / not spare / not hesitate (to do sth) / not scruple (to do sth)

to cherish / to begrudge / to pity / Taiwan pr. [xi2]

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

World War I (1914-1918)

to fight / fight / war / battle