Klingon 4th Fleet

In the mirror universe, the Fourth Fleet was a $𝜇$ battle fleet, a military unit consisting of Klingon Defense Force starships.

In the year 2378, Regent $𝜇$ tasked the Fourth and Eighth Fleets with the invasion of the $𝜇$ following the Gorn's brazen attack on $𝜇$. The fleets conquered $𝜇$, Karazek and Ozannot, and General $𝜇$ expected to land forces on $𝜇$ six weeks later but the invasion was halted when the Terran Rebellion destroyed the Klingon SoHcha Fleet Yards and liberated $𝜇$. 

Known engagements

 * Gorn-Klingon War
 * Invasion of Seudath, Karazek and Ozannot