That's not what happened though - Dxun served as the pinnacle of Revan's ingenious plan, and set the scene for the massacre of Malachor V. Going to copy-and-paste from my blog:
The Battle of Dxun was arguably the bloodiest battle of the Mandalorian Wars. It was said that for every Mandalorian who died, ten Republic soldiers shared the same fate. Little does history, or the fan-base, know that this was indeed intentional. HK-47 and Meetra Surik note that the battle could have easily been won without the amount of casualties they suffered. Under the command of Meetra Surik, Revan forced her forces through "a hundred feints" during the battle, dwindling her numbers down to a quarter of their full strength. The majority of her remaining soldiers were lost during a desperate charge across a minefield as they attempted to strike at the Mandalorian emplacements, as Revan ordered. This entire charge however was completely unnecessary for victory, and there were far easier choices for a more decisive victory.
HK-47 accounts that Revan saw Dxun as a way to break Jedi psychologically in the heat of conflict. Like I mentioned a while back, Revan will use this tactic many times. Take note that the forces of Dxun were under Meetra Surik's command. Revan eliminated a large bulk of her forces and defeated the Mandalorians together in a glorious victory for himself. It is no coincidence that after this battle, the remnants of Meetra Surik's forces saw Revan single-handily annihilate a huge number of Mandalorian ground forces on Althir with casual ease. And it makes perfect sense too: Revan wanted the soldiers not loyal to the Republic or to the Jedi Exile, but rather to him. He secretly orchestrated the entire battle in order to gain the loyalty of Surik's forces. Who would they be more loyal to: the general who, in their mind, lead thousands of them to their death in an unavailingly futile ground incursion on Dxun, or the one who expeditiously obliterated Mandalorian forces on Althir and showed superior leadership abilities? The answer is obvious.