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In page Lake Naroch Offensive:

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The whole operation turned out to be an utter failure, as it abated the Russians' morale without providing any help to the French, and has become a shining example of the use of a widely known World War I method of war, the human wave attack. Huge masses of people were continuously sent into the battle over and over again in the same place of the enemy front. Eventually, the attack on the German positions was brought to a halt because, as General Evert noted in his order issued on 30 March, it had not led to "decisive results" and "the onset of warm weather and abundant rains" had turned much of the area into swamps.[1]