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It was established in 1983, by Datuk Amar (now Tan Sri) Leo Moggie Anak Irok, after seceding from Sarawak National Party (SNAP) following his loss in the contest for the SNAP's president post against Datuk Amar James Wong Kim Ming.
BN was also challenged in Sarawak after the 1974 election, which saw the Sarawak National Party (SNAP) led by James Wong become tied with the DAP as the most important opposition party in Parliament, both of them holding nine seats each.