The Evangelical Church Winning All, previously known as the Evangelical Church of West Africa, is one of the largest Christian denominations in Nigeria, with about ten million members. ECWA is a partner church of the international Christian mission organisation, Serving In Mission (SIM), formerly Sudan Interior Mission. ECWA was founded in 1954 when the SIM-related churches (initially in Nigeria) came together to form an indigenous body. Since that time, mission stations, Bible Schools, academic schools, and medical programs have been transferred to ECWA leadership.