From what I’ve been able to tell, all the mercs are part of MercServ. I’m not exactly sure what the merc’s relationship is with MercServ, if they give them housing/training/food/etc, but from the arsenal crates, we know they have something to with equipment, and likely distributing contracts.
It’s kinda sketchy, but in game it seems to me that MercServ is just a neutral company that sells its services out to both the CDA and Jackal. But considering that doesn’t really make sense, since the CDA seems like a governmental organization and probably wouldn’t rely on mercenaries, in canon all the mercs would probably be used exclusively by Jackal, against generic scrubby soldiers.
We also know Aimee is employed by MercServ before she becomes a merc in the events of DB, so clearly MercServ does more than just working with Jackal and is probably a legitimate company with shady terrorist connections, rather than an exclusively underground company.
However, the scrubs trailer throws a wrench into all that assuming it’s canon, since we see mercs fighting on both sides. But that begs a bigger question, why is the CDA using mercenary work when they should be part of the government and should be able to just send in the military?
My theory, the CDA is actually a private business focused on cleaning up London after being contracted by the government and multiple private businesses around London. But that still doesn’t explain why they’re the only ones fighting jackal, or for that matter, fighting them at all instead of contacting the police.
I’m really tired so maybe that didn’t make any sense, and I’m gonna hold out on more theories until tomorrow, but hopefully I’ll be able to figure it out mlol