Why did it fail? Well Nicholas II was a very poor commander-in-chief. Also poor internal communications (mainly with the railways) led to a shortage of military equipment at the front. (6h 53min, jun 16, 1916 y – 8h 14min, aug 28, 1916 y)
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Date:
6h 53min, jun 16, 1916 y
8h 14min, aug 28, 1916 y
~ 2 months and 13 days