Galactic Empire (Star Wars) participant of Galactic Civil War
Thrawn trilogy
In Timothy Zahn's "Thrawn trilogy" of novels – Heir to the Empire (1991), Dark Force Rising (1992), and The Last Command (1993) – an army of former Imperials, led by Grand Admiral Thrawn, attempt to overthrow the New Republic and install a dictatorship known as the Empire of the Hand. The backstory of the series explains that, following their defeat at the Battle of Endor, the Imperial sectors are governed by several different military juntas that fight each other in a conflict known as the Imperial Civil War, all the while resuming the Galactic Civil War with the Rebellion's successor, the New Republic, for control of the galaxy for years until mostly joining together under Grand Admiral Thrawn. By the time of The Last Command, Thrawn has nearly defeated the New Republic, but they claim victory in a last-ditch effort, and Thrawn is killed by his own bodyguard, shattering the Empire's unity.Legacy
The Star Wars: Legacy comic book series, set 127 years after the original Star Wars film, explains that, during a civil war, the New Galactic Empire known as the Fel Empire declares war on the Galactic Federation of Free Alliances (Galactic Alliance), the successor state of the New Republic, after 83 years of a cold war that began in 44 ABY. This conflict begins the Sith-Imperial War, which after three years leads to the eventual defeat of the Galactic Alliance and the Galactic Empire asserting its domination over the galaxy once again in 130 ABY. A few months later, the Sith overthrows the Fel Empire. The Sith Lord Darth Krayt, the leader of the One Sith, usurps the throne and forces Emperor Roan Fel to take refuge in the fortress planet of Bastion.
In 138 ABY, the Galactic Alliance Remnant led by Admiral Gar Stazi, Fel's forces known as the Empire-in-exile led by Empress Marasiah Fel, and the New Jedi Order led by Jedi Master K'Krukk unite against Krayt's empire and eventually destroy it in the Battle of Coruscant, after a grand total of 157 years of its existence. The three united factions form a new galactic government called the Galactic Federation Triumvirate. The One Sith, led by Darth Wredd, remains at large and wages a war against the GFT. One year later, the former Empire-in-exile works with the other two factions, killing Wredd and dissolving the One Sith. The next year, the GFT defeats the secular alliances of the One Sith and in the aftermath of that conflict, the galaxy after 172 years of Palpatine's influence, enters an era of peace and unity.