https://www.polygon.com/2018/4/13/17232590/pubg-war-team-deathmatch-new-event-mode

Not long after releasing the game’s shotgun-only mode, Tequila Sunrise, PUBG Corp. announced a new event mode for PlayerUnknown’s Battlegrounds called War. Unlike the last several event modes, War is going to look a lot more like Team Deathmatch-style gameplay than the standard battle royale mode that PUBG fans are used to.