The Jalumi war, also known as Ogun Jalumi or Battle of Ikirun was a bloody war fought by Ibadan on the side of Ikirun against the allied forces of Ilorin, Ila, Ekiti and Ijesha on November 1, 1878 in the northeastern part of modern day Osun State. The Jalumi war was among the devastating civil wars that plagued the Yoruba nation in the 19th century. Others are, Osogbo war, Ekiti parapo/Kiriji war, Ibadan-Ijaye war e.t.c.
In June 1878, Ikirun, a town in modern day Osun State, called for the help of Ibadan to join her in fighting the armies of Ekiti, Ijesha, Ila and the Fulanis of Ilorin who had laid siege on Ikirun. Ibadan was unable to send her armies immediately because they went on an expedition to Meko, a town in modern day Ogun State. When the armies returned on October 14, 1878, they were instantly dispatched to Ikirun under the command of Balogun Ajayi Ogboriefon who was ordered to reach Ikirun within five days.

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