D-1004 Was originally trained to be a commando on Polis Massa by the Mandalorian Ghez Gilamar, one of the few non clones to train new troops, However at some point during training he requested a transfer to the rank and file troops destined for the 501st. During his training he showed a penchant for unusual tactics and out of the box thinking, also an uncanny ability to read tactics and situations, He also developed a natural ability to understand his men that serves him in his current leadership role.