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Shin told the rest to try challenging the fallen Dragon Knight Army a few more times, seeing if they could learn more about their battle formations, and came up with countermeasures that they could use against those.
The next few attempts went a little smoother compared to the previous ones as they were able to break through the outer layer of the army. But unfortunately, they were stacked in the middle and unable to advance further.
In the end, they were forced to retreat once again, knowing that it was only going to be dangerous for them if they insisted on going further.
They indeed failed three more times and felt disappointed. But it didn't mean that they gained nothing from it. Shin learned quite a lot from the strategies the opposing side was using. He also learned how to counter most of them despite having a limited number.