Reborn as a Barbarian! Conquering Another World Starting from a Defeated Battle is a Manga/Manhwa/Manhua in english language, Fantasy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Reborn into a low-tech barbarian tribe!?

In this story of rising to power, the protagonist is reincarnated as the chieftain of a defeated barbarian tribe, subjugated by a powerful empire. With their tribe on the verge of collapse after losing a war, the protagonist leads them in a fight to overthrow the empire and reclaim their freedom.

A thrilling tale of ambition, strategy, and survival unfolds as they strive to build up their tribe and challenge the might of the empire!