The Babel Conferences were a series of peaceful congregations between the many races that make up the United Federation of Planets. The site of these interstellar conferences was the neutral planet of Babel.
In a simulated war against the United Federation of Planets, which was used to train cadets at the Elite Command Academy of the Klingon Defense Force, there was a Babel Conference in which the Andorians demanded a separate alliance with the Gorn Hegemony. A small Klingon task force, comprised of ships from the Roptargh Heavy Assault Fleet, raided the conference and destroyed the USS Excelsior. Because the conference and the incoming Gorn vessels had not been attacked, that alliance was not formed. Starfleet had to reassign ships to protect the members of the United Federation of Planets and many important locations were vulnerable to attacks. (TOS video game: Klingon Academy)
During the briefing before this attack, General Chang calls that conference "a second Babel Conference", which clearly contradicts the sources mentioned above. However, it is possible that he was only aware of one Babel Conference.
- See also: Babel