SGA thematic list: Atlantis is cut off from Earth or secedes

[ratcreature]

I've decided to start a new thematic list for another one of my favorite SGA fic tropes, an Atlantis that either by necessity or choice has to fend for itself in the Pegasus galaxy.

For a story to be included in this thematic list the Atlantis expedition has to loose contact with Earth permanently, or at least for a significantly longer time than in canon, declare independence from Earth, or be stranded as a colony in Pegasus after Atlantis is lost. I've divided the list in the following subsections:

1. Atlantis is involuntarily cut off from Earth, e.g. it's on its own because Earth has been lost or is too occupied in the Milky Way (overrun by Ori, Replicators or Goa'uld, blown up, hit by a natural disaster...), or has never (or only much later) reestablished contact in the first place; contact with Earth may or may not happen eventually, but the separation has had a lasting impact, and is somewhat central to the story.
2. Atlantis intentionally secedes from Earth, i.e. declares its independence, or its allegiance to one or more Pegasus cultures/alliances or develops into a colony city in the (far) future.
3. The Atlantis expedition members (i.e. more than just the team) settle as a colony somewhere else in Pegasus, e.g. because Atlantis the city has been lost to some enemy or disaster, or taken over by Earth officials the original expedition can't support in their goals leading to mass desertion, or similar scenarios.

I've listed about thirty stories so far, but there are probably more, so if you know of any I missed please comment with a title and a link.