The most disastrous defeat came in 1916, in the Russian Brusilov Offensive, one of the most lethal battles in world history, whereby the Austro-Hungarian forces under Conrad's command lost more than 600,000 men, and were never again capable of mounting an offensive without German help.
Det mest katastrofale nederlag indtraf i 1916, under den russiske Brusilovoffensiv, et af de mest blodige slag i historien, hvor de østrig-ungarske styrker under Conrads kommando mistede over 600.000 mand, og aldrig senere kunne gennemføre en offensiv uden tysk hjælp.