The disastrous defeat at the Battle of Alde-Paldoran was only the beginning for the Rebel Alliance.
Within the Thirteenth Army's territory, aside from the forces that had been wiped out, General Gial Ackbar's Deep Sea Fleet was also operating in this region.
However, the Galactic Empire fleet was simply too powerful. General Gial Ackbar knew he was absolutely no match for them. The moment he showed himself, Darth Vader would annihilate him completely.
To preserve his strength, he could only remain hidden and try to lead this fleet out.
At the same time, Gial Ackbar repeatedly warned the Rebel Alliance leadership not to resist head-on. Otherwise, they would merely be throwing eggs at a rock. They needed to withdraw as soon as possible, abandon their existing gains as quickly as possible, and preserve the embers of the rebellion.
But the Rebel Alliance leadership rejected this proposal. The leaders who supported this operation included Bail Organa, and even the "Leader" supported it.
Yet the cruel reality lay before them. The Rebel Alliance had barely had time to revel in the joy of eliminating the Thirteenth Army before Darth Vader dealt them a crushing blow—he directly sent a massive force of 200 capital ships into the Thirteenth Army's territory. This force was plainly telling the Rebel Alliance: if you have the guts, come fight me head-on!
Only then did the "Leader" and the other Rebel Alliance leaders realize that the Galactic Empire had absolutely zero tolerance for this riot and uprising against the Thirteenth Army! They would rather abandon the war against the Kingdom of Dawn than leave the Rebel Alliance problem unresolved!
Moreover, Darth Vader knew very well that the Deep Sea Fleet was within the Thirteenth Army's territory. He cast a wide net, dispatching large numbers of reconnaissance craft everywhere