While Gowon was at the OAU summit in Kampala on 29 July 1975, a group of officers led by Brigadier Murtala Muhammed announced his removal. The coup was bloodless. Gowon went into exile in the UK and would not return for almost a decade.
Murtala's six months in office were the most consequential of any post-independence regime: a sweeping purge of the federal civil service ('Operation Deadwood'), creation of seven new states bringing the total to 19, relocation of the capital from Lagos to Abuja (Decree 6 of 1976), and a foreign policy that openly opposed apartheid South Africa and recognised the MPLA government in Angola against US wishes. See also Murtala's assassination and FESTAC '77.