Sabo plays a significant role in the Revolutionary Army in the world of One Piece. After being rescued by the Revolutionary Army, he was trained by Hack and Monkey D. Dragon due to his impressive combat skills, honed from his training with Ace and Luffy. Sabo quickly rose through the ranks, eventually becoming the Revolutionary Army's Chief of Staff. Despite his high-ranking position, Sabo is known for his casual relationship with the commanders and his tendency to leave his post during missions, which sometimes leads to disagreements with his peers.