Question about morning star! Spoilers

So I just finished the chapter in morning star where Darrow defeats the sword armada and I'm very confused by the battle. Can someone give a detailed explanation of how he won? Like I know they lured them to a moon and launched people at the chips from the moon, but why did Darrow have to claw to roques Ship? Also I am very confused by what happened to the pax (with the blue flame explosion or whatever). I feel like it didn't make much sense to me I feel like he captured roques Ship and suddenly all the enemy ships were no longer a threat for some reason. Please help explain this to me