April, 1758.—Brig. Gen. John Forbes takes command.
August, 1758.—Fort Bedford built.
October, 1758.—Fort Ligonier built.
November 24, 1758.—Fort Duquesne destroyed by the retreating French.
November 25, 1758.—Gen. Forbes takes possession.
August, 1759.—Fort Pitt begun by Gen. John Stanwix.
May, 1763.—Conspiracy of Pontiac.
July, 1763.—Fort Pitt besieged by Indians.
1764.—Col. Henry Bouquet builds the Redoubt.
October 10, 1772.—Fort Pitt abandoned by the British.