幄

运筹帷幄

yùn chóu wéi wò

lit. to devise battle plan in a tent (idiom)

运筹帷幄之中，决胜千里之外

yùn chóu wéi wò zhī zhōng , jué shèng qiān lǐ zhī wài

a general planning in the seclusion of his tent is able to determine the outcome of the distant battle (idiom)