Fearing for her life, Martha, at the urging of relatives, decided to free her deceased husbandâs slaves immediately. On January 1, 1801, a bit more than a year after Georgeâs death, Washingtonâs slaves gained their liberty.
The Hundred Years' War was a time of rapid military evolution. Weapons, tactics, army structure and the social meaning of war all changed, partly in response to the war's costs, partly through advancement in technology and partly through lessons that warfare taught.efore the Hundred Years' War, heavy cavalry (knights) was considered the most powerful unit in an army, but by the war's end, this belief had shifted. The heavy horse was increasingly negated by the use of the longbow (and, later, another long-distance weapon: firearms).
The Seven Yearsâ War. The Seven Yearsâ War was a global military war between 1756 and 1763, involving most of the great powers of the time and affecting Europe, North America, Central America, the West African coast, India, and the Philippines.