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efficacy
used in War and Peace

2 uses
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Definition
effectiveness (the ability to produce a desired result)
  • The adjutants general were there because they always accompanied the Emperor, and lastly and chiefly Pfuel was there because he had drawn up the plan of campaign against Napoleon and, having induced Alexander to believe in the efficacy of that plan, was directing the whole business of the war.
    Book Nine — 1812 (38% in)
  • Yet it is only necessary to abandon the false view (adopted to gratify the "heroes") of the efficacy of the directions issued in wartime by commanders, in order to find this unknown quantity.
    Book Fourteen — 1812 (8% in)

There are no more uses of "efficacy" in War and Peace.

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