The Jementah Civil War happened in 1879 in Jementah, Sultanate of Johor when Tengku Alam Shah, the heir of Sultan Ali of Muar refused to give the district of Muar to the temporary administration of Sultan Abu Bakar of Johor (then Maharaja in 1879). The final result of the civil war became a factor of the opening of the town of Muar. He began his moves by asking his cousins Tengku Nong and Tengku Mat to spread false information to the residents of Muar district to be on his side. He also gathered some powerful warriors for the battle.