Stronghold

Stronghold is a cold, remote world in the Mid Rim, wracked by intense storms. Very little native life exists on its surface, which is dominated by mountains and chasms. It holds little strategic value.

During the Galactic Civil War, the planet was used by the Rebel Alliance as a safeworld to hold noncombatants such as the families of frontline soldiers, or sometimes Imperial prisoners. Around 250 individuals could be secreted away in the network of caves and tunnels that the Rebels dug out.

Stronghold's only true claim to fame is that it served as the planet where the Charon first appeared out of otherspace. The Alliance was able to defeat the incursion and would later turn their safehouse into a listening post to be on the look out for any further Charon activity. This listening post continued to operate after the Alliance became the New Republic.

During 17 ABY, the Cult of Shadow targeted the world for the next step in its War of Darkness, choosing it as the perfect place to test its newly developed otherdrive so that the cult's leader, Sivter, could initiate contact with the Charon and assume control of them.

A strike team consisting of Raii Meriaz, Asemir Lor’kora, and Fiona, was sent to eliminate all personnel at the listening post without alerting the New Republic. The mission was performed flawlessly, and to ensure that the Republic wouldn't become suspicious, a cult team of impostors was installed to fool the government into believing that the listening post was still active.

=Sources=
 * Wookieepedia
 * CUSWE