During the time of the Galactic Civil War, the Empire established a blockade around the Endocray sector due to their suspicions of Rebel presence within its boundaries. To achieve this, the Imperial Navy deployed Interdictor cruisers in conjunction with sensor nets to effectively seal off all hyperlanes that traversed the sector. In response, the Rebel Alliance initiated an operation with the objective of eliminating the blockade control center situated on the planet Argovia. The captain of a cargo vessel, Leona Makk, successfully broke through the blockade and transported an Alliance strike force to the planet's surface. Following the destruction of the center, the Imperial forces were unable to effectively sustain the blockade, resulting in the reopening of the Endocray sector for travel.