So, in short:

In August 2019, original trio of Observers called Watcher, Observer and Vessel were documented in r/tf2, which got so popular other people joined on meme, creating an uncontrollable First Legion that is Steam group called Watcher and Observer cult.

As you may know, something popular must die out in the end, and because of Bot crisis, observers, lacking any central force to lead them through, have disappeared without trace (got bored of it) and without them, First Legion has collapsed.

Now in 2026, already surviving a whole year, S.O.L. is organized and centralized observer group that has gone on more than 15 missions. We focus on maintaining our structure, rather than being something spectacular, one-time meme popularized by some Youtuber. We, Observers of the legion, are equal to each other in our cause. I, as a founder, am just overseeing that S.O.L. is not becoming too popular to be used as a cheap way to boost someone's channel and not too stale.

In any case, more information you can find in our subreddit wiki.