20 ABY to 29 ABY

The following took place between the years of 20 ABY to 29 ABY.

Events

The Dark Council solidifies its control over Antei while the Clans spread out into their own territories.
Callus Bo'Amar Joins the TIE Corps

Invasion of Antares; the Dark Brotherhood conquers the Antares System.
Fifth Great Jedi War; a mind controlling plague spreads through the Dark Brotherhood, eventually its source, the ancient Sith Lord Okemi, is defeated by Firefox.

Jac Cotelin becomes Dark Lord of the Sith for a second time.
K'hamar'an Crisis; the mysterious K'hamar'a cult infiltrate the Dark Brotherhood to steal back several artefacts. The Dark Brotherhood invades the K'hamar'a homeworld.
Yuuzhan Vong agent infiltrates ExGal society
Callus Bo'Amar is dishonorably discharged from the TIE Corps
Alector Isradia enrolls in the Shadow Academy

Invasion of Coratua; the Dark Council decide to invade the nearby Coratua system, fearing the growing pirate presence there may draw unwanted attention from the New Republic.
Clan Exar Kun and Clan Satal Keto merge to form Clan Plagueis

Tensions between the Clans increase after a number of mishaps almost escalate to all out war in the Aranna and Selen Incident.
Kaine Mandaala abdicates his position as Herald to Cyris Oscura
Cyris is attacked by an unknown foe, leaving him unable to perform as Herald. His Praetor, Muz takes over.
Construction begins on a new Dark Brotherhood fleet as part of Operation Tempest Bravo.

Third Brotherhood Civil War; after it emerges Jac Cotelin has been using a clone of himself, Jaac Cotelin, the Dark Brotherhood decends into chaos, with both Grand Masters claiming to be the true Dark Lord of the Sith. Eventually Jac Cotelin destroys the clone.
The Yuuzhan Vong War begins
Establishment of the Battle of Yavin-based calendar.

Aristan Dantes succeeds Jac Cotelin as Dark Lord of the Sith upon his appointment to Grand Master.
Kir Katarn succeeds Firefox as Justicar of the Chamber of Justice
Reintroduction of Ravana Squadron.
Clan Taldryan, Clan Scholae Palatinae, and Clan Plagueis gain the titles of First, Second, and Third Clan, respectively, during the Rite of Supremacy
The New Jedi Order is driven off Yavin IV by the Yuuzhan Vong
House Archanis (Clan Taldryan) is reopened after being closed shortly after The Exodus

Muz Ashen Keibatsu replaces Halcyon Rokir as Deputy Grand Master
Kaine Mandaala returns as Herald
The Yuuzhan Vong invade and conquer Coruscant
Shikyo Keibatsu succeeds Kaine Mandaala as Herald
Eighth Great Jedi War; the Brotherhood is invaded by the Yuuzhan Vong; Antei falls.
The Brotherhood evacuates the Antei System
The Shadow Academy is relocated from Lyspair to the Arcanum
The Orian system is invaded by the True Brotherhood during the Invasion of Orian.
Clan Scholae Palatinae reclaims the Cocytus System