敗軍の将は兵を語らず

はいぐんのしょうはへいをかたらず

expression

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don't be a sore loser, don't make excuses for your failures, a defeated general should not talk of strategy(proverb)

敗	failure, defeat, reversal
軍	army, force, troops, war, battle
将	leader, commander, general, admiral, or, and again, soon, from now on, just about
兵	soldier, private, troops, army, warfare, strategy, tactics
語	word, speech, language