The Oath of Obedience represented a commitment undertaken by riot troopers upon their graduation from the Imperial Academy on Yinchorr. This vow occurred during a time span from 19 BBY to 1 BBY (years). Specifically, it was a promise of unwavering loyalty, even unto death, to both Emperor Palpatine and the Galactic Empire.
This Oath of Obedience is referenced within the "Riot Trooper" data entry found in Star Wars: The Force Unleashed II. This video game by LucasArts was available on the PlayStation 3 and Xbox 360 consoles, and was initially launched in 2010.