The Sergeant's Dragon

In another world, a fierce power struggle rages between two factions: [Green Dragon & Orcs] vs. [Gold Dragon & Elves]. Amid this conflict, Sergeant Lee Geon — a living legend of the modern battlefield — is reborn as an orc with a powerful ability to tame monsters. A modern soldier's instincts and battlefield experience, now wielded in a fantasy world through the body of an orc with the rarest of abilities. The sergeant's new war is about to begin.

Original Webtoon:
Naver Webtoon, Naver Series