Reborn as a border town primary school, with thousands of miles of yellow sand in front of you and the gate of the human race behind you.
After dying in battle in his previous life, he only saw one thing clearly -
The world is about to perish, and the trouble comes from a barbarian.
Aliens are coming, traitors are hiding, and the mountains and rivers are about to be shattered.
He has no power, no one to trust, no one to speak to.
There is only training, building fortifications, dormant, and fighting to the death.
Use an isolated camp to block a world-ending catastrophe.
If the barbarians don't come out, the disaster will continue.
He will not retreat, die, or surrender.
