In the mid-26th century, Pitkin was an agricultural world within the Outworlds Alliance, located close to the Alliance border with the Federated Suns. In 2581, the Star League sent the Outworlds Alliance Task Force consisting of two SLDF corps supported by an auxiliary force from the Draconis Combine to forcibly incorporate the Alliance into the Star League, following the mass rejection of the Pollux Proclamation by the Alliance along with the other major Periphery states. Although Pitkin wasn't targeted in the first wave of attacks, it was an early target during the second year of the invasion.

House Davion forces were allowed to effectively annex Pitkin in 2584 by the new commander of the Outworlds Alliance Task Force, Major General Franklin Barnex, following SLDF redeployments which removed units from occupied worlds in the Outworlds Alliance to fight against the Taurian Concordat. On the 1st of August 2585 Pitkin was formally ceded to the Federated Suns along with 8 other worlds as a part of the terms laid out within the Treaty of Cerberus.[5]