What attack had Washington been preparing for before the Battle of Yorktown?

Although the war persisted on the high seas and in other theaters, the Patriot victory at Yorktown ended fighting in the American colonies. Peace negotiations began in 1782, and on September 3, 1783, the Treaty of Paris was signed, formally recognizing the United States as a free and independent nation after eight years of war.

a.that is my answer.

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the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.