By the time of 0 BBY, which fell within the Galactic Empire's era, the Rebel Alliance's 61st Mobile Infantry engaged in several battles on Mygeeto, a planet located in the Outer Rim. Riot Squadron of the Alliance was also involved in combat there, an experience that led to the squadron acquiring its designation.
In 3 ABY, while stationed at a rebel base on the ice planet Hoth, 61st soldiers Roja and Beak recalled their experiences fighting on Mygeeto to First Sergeant Hazram Namir, who had become part of the company after the events on Mygeeto. Following the Battle of Endor by a few weeks in 4 ABY, members of Riot Squadron shared memories of the fighting on Mygeeto while they were on Jiruus.
The 2015 novel Battlefront: Twilight Company, penned by Alexander Freed, was the first source to reference the battles that took place on Mygeeto.