Star Wars: Imperial Entanglements
Resolute base is a self contained part of the Rebel Alliance, based on Jagomir.
Once a separate resistance force, they joined the Rebel Alliance in the time before the destruction of the first Death Star.
Originally based on Arda I, and led by a trio of General Ran Niall, Setenna Hase and Commander Qurno, the rebel group did good work against the Empire over a few years. They were betrayed by Setenna Hase’ assistant Var Narek leading the Empire to mount a ferocious onslaught on the base, causing Generall Niall to sacrifice himself in a last stand to allow others to escape the base.
Re-establishiing the base on Jagomir, the traitor was discovered, but Setenna Hase remains cautious about her troops, and tends to send out small groups for discrete missions, or on long-term, autonomous anti-imperial operations of their own design.