"Panzer World Galient" is a 25-episode anime series set in a medieval fantasy world where advanced technology and feudal societies coexist. The story takes place on the planet Zublian, where humanity lives under the oppressive rule of the alien race known as the Dorles. The Dorles, who arrived on Zublian centuries ago, have subjugated the human population, using their superior technology to maintain control. The humans, divided into warring kingdoms, struggle to resist the Dorles' dominance while also battling each other for power and resources.

The protagonist, Jinto Lin, is a young nobleman from the kingdom of Lin. After witnessing the destruction of his homeland by the Dorles, Jinto becomes determined to fight against their tyranny. He discovers an ancient, powerful mecha called Galient, which was created by the planet's original inhabitants, the Zublians, to combat the Dorles. Jinto pilots Galient and begins a journey to unite the fractured human kingdoms against their common enemy. Along the way, he forms alliances with various characters, including the skilled warrior Yuric and the mysterious Zublian priestess, Lian.

The narrative explores themes of resistance, unity, and the clash between tradition and technology. As Jinto gathers allies and resources, he faces numerous challenges, including internal conflicts within the human kingdoms and the relentless pursuit of the Dorles. The Dorles, led by the ruthless commander Gorgon, deploy their own advanced mecha and military strategies to crush any resistance. The series delves into the complexities of war, highlighting the sacrifices and moral dilemmas faced by both sides.

Throughout the story, the origins of the Zublian civilization and the true nature of the Dorles' invasion are gradually revealed. The Zublians, who once thrived on the planet, created the Galient mecha as a last resort to protect their world. However, their civilization fell into decline, leaving behind remnants of their technology. The Dorles, exploiting this legacy, seek to harness the planet's resources and eliminate any threat to their rule.

The series builds toward a climactic confrontation between Jinto and the Dorles, with the fate of Zublian hanging in the balance. The resolution of the conflict underscores the importance of cooperation and resilience in the face of overwhelming odds. "Panzer World Galient" combines elements of science fiction and medieval fantasy, offering a unique blend of mecha battles, political intrigue, and character-driven drama.