  the brusilov offensive ( brusilovskiÄ­ proryv), also known as the june advance,biography of one of the participants  was the russian empire's greatest feat of arms during world war i, and among the most lethal offensives in world history. historian graydon tunstall called the brusilov offensive of 1916 the worst crisis of world war i for austria-hungary and the triple entente's greatest victory, but it came at a tremendous loss of life.{{cite journal |first=graydon a. |last=tunstall |title=austria-hungary and the br
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