Mecha Era: I Became a God of War

While conducting a time machine experiment, I accidentally came to an unknown world. This is a dangerous time. There are alien beasts attacking humans everywhere. The humans here have created powerful mechas to fight against the alien beasts. Everything here is unrecorded by my civilization. Unknown technology and unknown enemies. How should I survive in this troubled world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.