"When Lews Therin Telamon and the Hundred Companions resealed the Dark One's prison, the counterstroke tainted saidin. Eventually every male Aes Sedai went horribly insane. In their madness these men, who could wield the One Power to a degree now unknown, changed the face of the earth. They caused great earthquakes, leveled mountain ranges, raised new mountains, lifted dry land where seas had been, made the ocean rush in where dry land had been. Many parts of the world were completely depopulated, and the survivors were scattered like dust on the wind. This destruction is remembered in stories, legends and history as the Breaking of the World."

Also called the Time of Madness, the Breaking lasted roughly a hundred years from sealing of the Bore to the death of the last male Aes Sedai.

References (Possible Spoilers)#