Parti Bersatu Sabah
(English: United Sabah Party)
Founded: 5 March 1985
Formed by dissidents of BN component party Berjaya due to the ceding of Labuan as a Federal Territory. Under the leadership of Joseph Pairin Kitingan, PBS defeated the dominant Berjaya in the Sabah state election of 1985 and became the only non-BN Sabah government in Malaysia's history to serve an entire term. The results triggered street demonstrations and a snap election was called within a year, which was won with a bigger margin by PBS. In an unexpected twist, it joined BN after the snap polls but its relationship with UMNO was often acrimonious, with the latter supporting its reluctant partner USNO at the 1990 state election. In the Malaysia General Election that year, PBS pulled another surprise by quitting BN during the hustings to align with Gagasan Rakyat (People's Concept) led by S46. Despite some PBS leaders breaking off to form AKAR and SAPP, PBS triumphed narrowly at the 1994 Sabah election but was toppled as the state government when more lawmakers crossed over to these splinters or set up new parties PDS and PBRS, leaving PBS with five seats. All four parties eventually ended up in Sabah BN. In 2002, PBS itself rejoined BN, reuniting with its erstwhile colleagues. Following the change in government in the 2018 Malaysia GE, PBS pulled out of BN again for the first time in 16 years to form an independent coalition, GBS, with PBRS and Sabah STAR. Later that year, Maximus Ongkili succeeded long-time leader Kitingan to take the helm of PBS.