The 91st Mobile Reconnaissance Corps, also identified as the 91st Mobile Reconnaissance Force, also known as the 91st Reconnaissance Corps or simply as the 91st Recon Corps, was a corps of recon troopers in the Der'kal Army during the Federation-Der'kal War.
Comprising divisions of clone soldiers, BARC troopers, and ARF troopers the 91st Reconnaissance Corps was led by Clone Marshal Commander Neyo.
The identifying marks of the 91st were small red circles with a white sword pointing upside down running across them. To protect their commander, 91st's lieutenants wore, like Neyo, a specialized helmet very similar to those of clone assassins that gave them a more sinister look.