The Onderon Resistance, also known as the Onderon underground, was the name given to the resistance operating on the planet of Onderon throughout the Galactic Civil War.
In the year 2 ABY, this group provided aid to the Alliance to Restore the Republic during the attack targeting an Imperial military ordnance center located on Onderon. Before the Rebel assault, they bravely worked to take down the sensor nets along with the planetary shields, which enabled the Rebel starships to obliterate the base while sustaining only a few casualties.