Negeri Sembilan, at the time of Raja Melewar's accession, covered a larger area than its modern-day boundaries. Besides the entirety of modern Negeri Sembilan, it also covered parts of what is today Selangor, Melaka, Pahang and Johor. The original nine chiefdoms or domains in 1773 that gave Negeri Sembilan its name are namely Sungai Ujong, Jelebu, Rembau, Johol, Jelai, Ulu Pahang, Naning, Segamat and Klang. The latter four chiefdoms were annexed into neighbouring states in the 19th century. Naning was annexed into the Straits Settlement of Melaka in 1832 following the Naning War; Ulu Pahang became Bera region of Pahang, Segamat annexed into Johor and Klang became Kuala Langat region of Selangor.