Daro

"The signal sent by CC-5576 originated on Daro, a terrestrial planet in the Outer Rim with no settlements or installations."

- Tech, regarding Daro

Daro was a remote planet in the Outer Rim that contained no settlements or major populations. It did, however, host a secret Imperial military base built within a mountain. The installation was used to train new recruits in the Imperial Army under the instruction of Clone Commandos. One instructor, Clone Captain Gregor, attempted to desert from the army and fled the base.

Although he was soon recaptured, he sent a distress call to fellow clone, Rex, who relayed it to Clone Force 99. The clones known as the "Bad Batch" infiltrated the facility and freed Gregor from his cell. They fought their way through the Imperial Stormtroopers and clone commandos guarding the base and escaped, but Sergeant Hunter fell from their shuttle and had to be left behind, falling into Imperial custody.

Star Wars: The Bad Batch

 * "War-Mantle"
 * "Return to Kamino"