https://www.gamespot.com/articles/battlefield-1-premium-pass-dlc-will-be-free-for-li/1100-6461539/

EA has announced it is making the Premium Pass for Battlefield 1 available for free for a limited time. From September 11 to September 18, Battlefield 1 players will be able to get the premium pass at no cost, giving them access to all the additional content released after the game's initial launch.

The Battlefield 1 premium pass includes a total of four expansions: They Shall Not Pass, In the Name of the Tsar, Turning Tides, and Apocalypse, all of which encompass new multiplayer maps, Operations, and Elite classes, among other things.