This Kutuzov who before the battle of Austerlitz began said that it would be lost, he alone, in contradiction to everyone else, declared till his death that Borodino was a victory, despite the assurance of generals that the battle was lost and despite the fact that for an army to have to retire after winning a battle was unprecedented.
There are no more uses of "unprecedented" in the book.
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Human impact on the environment is increasing at an unprecedented rate.
The targeting of civilians is unprecedented in the conflict.