Hye planned to take his time here and gather as much loot as he could. If any danger approached, he'd leave this battle to Major and his forces, head towards the next danger, and illuminate it.
He knew he did a great help to Major. Even if he didn't know the man leading the forces here, he could tell from the swift changes in tactics that he was someone pretty experienced and capable. So it was fine to leave him even now, as Hye already disturbed the enemy's formation, and Major took advantage of that.
So he kept himself fighting here while waiting for another fire siren to blow. But luckily nothing like that happened, and he kept hitting the enemies here for an entire week.
During this time, he felt like he got something close to being sent back in time again. He felt so familiar when he did so, recalling the glorious moments he experienced and lived through back at the apocalypse, feeling this one was worth getting added to this long list of his.