arbitrament

Every possible means consistent with Divine law and human dignity must be employed ... to avoid the final arbitrament of nuclear warfare.

From Time Magazine Archive

There were many circumstances which tended to make both monarchs prefer a more peaceful arbitrament of their quarrel, and to disgust them with the war.

From History of the Reign of Philip the Second, King of Spain, Vols. 1 and 2 by William Hickling Prescott

I remembered France and my Emperor, now depending on the arbitrament of war, bent down, fighting on their knees and with their teeth against so many and such various assailants.

From The Works of Robert Louis Stevenson - Swanston Edition Vol. 20 (of 25) by Robert Louis Stevenson

Roused by the eloquence of their leader, they went further than he would venture, and advocated an appeal to the arbitrament of war.

From The 'Patriotes' of '37 A Chronicle of the Lower Canada Rebellion by Alfred D. (Alfred Duclos) DeCelles

And the arbitrament of war, and war’s desolation, is a foregone conclusion.

From A Rebel War Clerk's Diary at the Confederate States Capital by John Beauchamp Jones