Entering through the front door was definitely not feasible; once the iron gate was opened, zombies would swarm out, making them difficult to deal with.
Furthermore, Li Yu didn't want to waste any more bullets at this time. It so happens that a good number of hand grenades were taken from the armory, rarely used, but this time a lot were brought along.
Just now they stood at the entrance of the cave, and if they threw hand grenades into it, the cave might collapse. If it collapsed, any military supplies inside would be of no concern to them.
So it was not an option to detonate at the entrance, but between the entrance and the iron gate, there was a blank space of more than ten meters.
It was just that it would be difficult for them to handle from outside the door.
...
Everyone began to climb, slinging the Long Knife onto their backs and clambering up the mountain with hands and feet.
Less than 40 meters up, they saw a wall to the right.