In the year 2019 the "Shanghai Crash", which was the collapse of the entire Chinese financial system, plunges the whole world into the worst economic recession since the Great Depression. Third world countries suffered the worst from the crisis, and were on the brink of collapse. Taking advantage of the chaos, a shadowy organization known as the "Cartel", a syndicate of private military contractors and corporate magnates, was able to infiltrate the failing governments and install its own puppet regimes.

The United Nations' Transnational Crime Organization suspects that the Shanghai Crash was orchestrated. Initial investigations were ceased due to insufficient evidence, and is now regarded as a mere conspiracy theory. Still determined to uncover the suspicious cause of the Shanghai Crash, the "Chimera Protocol" was signed in secrecy, binding several UN member states together to provide intelligence and military support for the investigation. The United States, suffering from the economic crisis and recurring defense budget cuts, struggles to maintain their influence as a global superpower.

http:// actofaggression.wikia.com/wiki/Operation_Eclipse