10 ABY to 19 ABY

The following took place between the years of 10 ABY to 19 ABY.

Events

Kane returns from exile and becomes Dark Lord of the Sith. The Dark Brotherhood is established.
Kane departs, Jedgar O. Paladin becomes the new Dark Lord.
The Shadow Academy is established.
Fragmentation of the Galactic Empire
Possible extinction of the Order of the Sith Lords (to date)
The New Republic retakes Coruscant
Luke Skywalker establishes a Jedi Academy on Yavin 4 and declares himself a Jedi Master

The Other becomes Dark Lord of the Sith.
First Brotherhood Civil War; after unearthing the ruins of an ancient Obelisk temple, the Other resurrects the Obelisk Order before abdicating the Iron Throne and fleeing the Dark Brotherhood to pursue his own ends. He is hunted down and killed by Jac Cotelin.
Jac Cotelin succeeds the Other as Dark Lord of the Sith.
Using the information contained in one of the holocrons from the Obelisk ruins, Jac Cotelin resurrects the concept of the Star Chamber, itself based on the Sith Council of the Old Sith Empire, as an advisory body to the Dark Lord of the Sith.

The Third Great Jedi War erupts between the Clans after the discovery of an ancient suit of Dark Armor.
Archibald Zoraan is driven mad by the Dark Armor and is deposed following an unsuccessful rebellion, he is succeeded by Chi-Long.
Firefox becomes Dark Lord of the Sith.

To battle the state of inactivity amongst the Obelisk Houses, Sharad Taldrya Hett ran the Order-wide event, Feel the Force.

After uncovering clues to the location from the Obelisk ruins, Firefox dispatches agents to the ancient home of the Star Chamber, Antei.

As tension between the Dark Brotherhood and the Imperial Remnant escalate, the Fourth Great Jedi War erupts between the Clans.
The Exodus; the Dark Brotherhood secedes from the Imperial Remnant.