ok the main thing is the storytelling aspect and s310. in a post-apocalypse world myths and rumours and hearsay ascend into law very quickly as all the tools & things we're used to using to verify information are suddenly ripped away. no more googling to check no more calling ahead no more research. all you have is stories. the old guy you met on the side of the road said there was gas still at the gas station, so there must be. the boy you met told you he's never killed anyone and how would you check? the lady with the broken glasses tells everyone not to go around the bend so no one does. the man with the limp said it was safe up ahead and you'll have to believe his story or go back. you stake your life on stories. someone who can tell stories that seem to come true is god. someone who can tell stories with good endings that seem to come true is even better.
when you hear the story about the ten-foot-tall one-legged man who decapitates people with a metal shoe, your skeptical self of course thinks it's ridiculous. but the real question is is it more ridiculous than the dead coming back to life? the storytellers shall inherit the earth.
silver in my head in this universe was displaced from his home country in some way or shape or form when he was very young. when the apocalypse hits perhaps a family member of his or someone he loves decides to stay behind and die because leaving home during the original displacement was too devastating. this time they die in their own home. maybe the loved one who stays behind does so in part because cell towers are down and only landlines still work. they still have loved ones in the original home country and they want to stay at home trying to call back one last time before the zombies reach their neighbourhood. silver flees.
or maybe silver is displaced alone when he is very young. part of how he rises to power among people is because he has actual practical experience with displacement. when the apocalypse originally hits and everyone is fleeing their homes, it's not his first rodeo. he's the only one who knew to bring not just canned food, but also a can opener. maybe he had to care for someone through part of his original displacement and that plays into his ability to become "quartermaster," among those evacuating to get away from the zombies. he knows how to manipulate people going through their first evacuation. but of course it ends up being read as genuine care.
maybe when the main goal of apocalypse flint threatens to lead to possible displacement again that sets off the betrayal. or maybe flint wants to stay and fight and defend some outpost instead of evacuating but silver has resigned himself that no home ever lasts and there will always be evacuation and displacement. maybe he ends up dooming madi's community, which has actually succeeded in forming a strong, well-guarded resilient community, to dispersing and becoming nomadic, moving place to place trying to set up again before they're chased out.
also in my modern post apocalypse they run out of weapons/ammo before the big s310 battle and so they raid a historical site and use the old muskets like they do in black sails 310. bc that would be fun 😁