In the year 12 ABY, during the significant Orinda campaign of the Galactic Civil War, a battle occurred within the confines of the Tyan system. General Wedge Antilles, commanding New Republic forces, and Head of State Gilad Pellaeon, leading Imperial Remnant forces, had been engaged in a pursuit across the Mid Rim. Following a drawn-out fight at Orocco between the New Republic's Rogue Squadron and the Remnant's 181st Imperial Fighter Group, the 181st encountered Antilles and the Executor-class Star Dreadnought Lusankya at Tyan. Under the command of Turr Phennir, the 181st triumphed over the Lusankya, resulting in the Remnant's acquisition of the planet.