Star Wars - Imperial Officer Uniforms by Grand-Lobster-King on DeviantArt
Star Wars movie costumes and historic military uniforms. Outfits of the Imperial people based on Nazi uniform? - Nationalclothing.org
Are the Star Wars imperial uniforms based on the WW II Japanese Navy, especially the caps they were wearing? - Quora
File:Star Wars and the Power of Costume July 2018 43 (Imperial officer's costume, hat, code cylinders, holster, and blaster from Episode VI).jpg - Wikimedia Commons