S-Oil Corporation pleaded guilty to a criminal violation of the Sherman Act and for participating in a bid-rigging and price-fixing conspiracy involving contracts to supply fuel to U.S. Army, Navy, Marine Corps, and Air Force bases in South Korea. The government alleged that, beginning around March 2005 and continuing into 2016, S-Oil and other companies secretly pre-determined which company would win each contract and then submitted collusive bids. S-Oil and another company charged in the matter paid a total of approximately $75 million in criminal fines. S-Oil employee Eul-Jin Hyung was also charged.