Following the war, Nigeria enjoyed an oil boom in the 1970s, during which the country joined OPEC and received huge oil revenues. Despite these revenues, the military government did little to improve the standard of living of the population, help small and medium businesses, or invest in infrastructure. As oil revenues fueled the rise of federal subsidies to states, the federal government became the centre of political struggle and the threshold of power in the country. As oil production and revenue rose, the Nigerian government became increasingly dependent on oil revenues and international commodity markets for budgetary and economic concerns. The coup in July 1975, led by Generals Shehu Musa Yar'Adua and Joseph Garba, ousted Gowon, who fled to Britain. The coup plotters wanted to replace Gowon's autocratic rule with a triumvirate of three brigadier generals whose decisions could be vetoed by a Supreme Military Council. For this triumvirate, they convinced General Murtala Muhammed to become military head of state, with General Olusegun Obasanjo as his second-in-command, and General Theophilus Danjuma as the third. Together, the triumvirate introduced austerity measures to stem inflation, established a Corrupt Practices Investigation Bureau, replaced all military governors with new officers, and launched "Operation Deadwood" through which they fired 11,000 officials from the civil service.