Kalu Darr was born on the home planet of Dorin in the year of 25 bby. His childhood was nothing special except that one attack by Grievous which the Republic forces repelled but he was mostly unaware of all it meant. He was raised on stories about the clone wars in many aspects, some he felt was true others maybe not so true. Why would the Jedi try to assassinate the chancellor for example.
Not to long after, it changed. The empire’s stormtroopers where garrisoned there and that was all it was. In the beginning it wasn’t all to bad but as the time went he saw strict rules turn to oppression and oppression turn into the occasional war crime. But the empire’s soldiers where not punished, not in any of the cases, the Kel Dor people just wasn’t important enough.
That was when he fled and found his way to the rebellion and studied under its strategists and tacticians. He was sent to a few minor engagements to assess his general skill set and tactical approach. After that he was sent to The Stalking Nexu