Hadejia, town and customary emirate, eastern Jigawa state, northern Nigeria. It lies on the northern bank of the Hadejia River (an occasional feeder of the Komadugu Yobe, which streams into Lake Chad). The emirate's savanna zone initially included Hadejia and six other little Hausa realms that honored the realm of Bornu. Around 1805, Umaru, a Fulani chief who held the title sarkin ("boss ") Fulanin Hadejia, swore devotion to the Fulani jihad (blessed war) pioneer, Usman dan Fodio. Umaru's sibling and replacement, Emir Sambo (ruled 1808–45), authoritatively established the Hadejia emirate in 1808, moved his base camp to Hadejia town, set up a market, and started to merge Fulani rule over the little neighboring Hausa realms.
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Emir Buhari (likewise Bohari, or Bowari; ruled 1848–50, 1851–63) denied Hadejia's faithfulness to the Fulani sultanate focused at Sokoto in 1851, struck the close by emirates of Kano, Katagum, Gumel, Bedde, and Jama'are, and extended his own emirate. Hadejia was brought once again into the Fulani domain after Buhari's passing, yet battles with neighboring Gumel proceeded until 1872. In 1906 the British introduced an emir, Haruna, and fused the emirate into Kano area. The emirate turned out to be essential for recently made Jigawa state in 1991.
The town is currently a market place taking care of cotton, millet, sorghum, fish, and the rice filled in the stream valley. It fills in as a significant gathering point for peanuts (groundnuts), a fare crop. Steers, goats, guinea fowl, sheep, and jackasses are kept by the nearby Hausa and Fulani people groups. A few little lime businesses exist in dispersed pieces of the zone. Hadejia town is situated on the auxiliary thruway among Gumel and Nguru, which joins it to the primary interstate at Kano and to the railroad at Kano and Nguru. Pop. (2006) neighborhood government zone, 105,628.