The War is the fourth studio album by South Korean-Chinese boy band Exo. It was released digitally on July 18, 2017 and physically on July 19, 2017 by SM Entertainment under Genie Music's distribution. The album includes a total of nine tracks including the lead single "Ko Ko Bop". The Warreceived the highest number of pre-orders at the time for a K-pop album, at more than 800,000 physical copies.[1]24 days after being released, it became EXO's fourth consecutive studio album to have sold over a million copies.