First things first: your containment procedures.
SCP-XXXX and other instances are to be relocated to [REDACTED] and embedded with a tracking device, failure to comply will result in termination.
This is not a good procedure, the reason being that you've redacted the location they need to be relocated to. If I was a low-level researcher reading this for information on how to contain them, I'd be completely stumped; if you need to, make up a designation like Area-XXXX or Provisional Site-837 or something. Redactions to the containment procedures in general are rarely a good idea.
SCP-c is to be culled to prevent local ecological damage, though instances may be recovered for testing and moved to a specialized reserve.
How heavily should they be culled? Why are there any in the wild anyway, wouldn't the Foundation want to contain any anomalous fauna they come across? This whole section feels rushed and far too short, given the amount of stuff you're describing. It doesn't need to be twenty sentences long, but it should at least look something like a professional document.
SCP-XXXX is a tattoo located above the left ear depicting a cobra. Sizes can vary but effects remain the same.
I have a lot of problems with the logistics of this anomaly. As it is, it seems like the tattoo's a sub-anomaly, and the people — the -a instance and -b instances — seem to be the actual SCP. Or, if the tattoo is the anomaly, that element should be played to further; it should be a very specific design, and it shouldn't matter who applies it to you. Currently, you have far too many moving parts for such a short article.
During operation [REDACTED] in Vietnam during 1954-1965 SCP-████ was successfully contained by the Foundation. Due to the varied difficulties in retrieving SCP-████ the conflict escalated and American and Soviet forces intervened resulting in a 19 year war.
No. Absolutely not. This sort of handwavey "ooh, SCP was responsible for this historical event", without suitable research and explanation surrounding it, only serves to cheapen the reality and make your article seem poorly-thought-out and one-dimensional. If you have to create an imagined cause for a well-documented conflict (during which horrendous war-crimes and atrocities were committed and thousands, if not hundreds of thousands, of innocent people were killed) you should at least present some evidence that you know something about the history you're changing. Some historical or alt-history SCPs are incredibly good. This is not one of them.
Personally, I'd recommend narrowing your focus a little here, and expanding on one of the elements. Perhaps the Foundation's use of them as staff; that's something potentially novel and narratively promising. I'm not trying to stop you from writing about history, but I think completely re-writing the cause of the Vietnam War is a departure from reality that needs much more research to back it up. References to it are fine, but not something like this that contradicts established history and replaces it with "an anomaly did it". The core idea has potential: the framing doesn't.
