You mean when he looked down the hill and at the huge strip-mining operation, where some accident caused the operation, and the planet, to be abandoned? I can't figure out if the kids were born on the planet right before the accident, and all their adult family and tribal members died in whatever happened, or it has been a couple of generations, though a longer time period would not explain why there are no older people present. As for being the only one, he is looking for his sister, so I am sure we will get more flashbacks of the Republic ship sending down troops to investigate and evacuating all the other kids from the planet?
The flashbacks are post-clone wars, but before the Republic becomes the Empire, which I figured out after looking up Cassian's age. And that is something I have to call BS on, though. In trying to figure out when the flashbacks are set, I find that Cassian Andor is only 26 years old in Rogue One, as he is listed as being born in 26 BBY, making him merely 21 during Andor, while being played by a 42-year old actor (37 in Rogue One). I will never be able to believe the character is that young and that hurts the immersion some. Hopefully what this article talks about how the series is changing the canon about Cassian and making the character older is true.
Everybody’s talking about Kenari!
decider.com