The Hundred Companions was a group of the most powerful male Aes Sedai of the Age of Legends. They agitated for a quick solution to the war against the Dark One, disrupting meetings and trying to force through Lews Therin's proposal. Numbering one hundred and thirteen, the companions were led by Lews Therin Telamon himself to seal away the Dark One. The plan originally required a circle of men and women, placing seven seals on specific points of the Bore into the Dark One's prison at Shayol Ghul. The women refused the plan on the grounds it was too risky, but Lews Therin had such power he secretly assembled a raiding force, and pressed ahead.
Although they succeeded in sealing him away, the Dark One launched a final counter-stroke, the taint of his touch on saidin. The Hundred Companions and Lews Therin went insane immediately, and began (along with every other male channeler) what became known as the Breaking of the World.