The clash known as the battle of Randa occurred during the time of the Galactic Civil War.
At some point in the timeline between the Battle of Yavin and the Battle of Endor, the forces of the Galactic Empire brought ruin to the Rebel base located on the planet Randa. Admiral Gaen Drommel oversaw the Imperial forces during this operation.
Drommel's successful command during this engagement led to his later appointment as commander of the Executor-class Star Dreadnought known as the Guardian.