They Shall Not Pass is the first Battlefield 1 DLC release but it won't be the last.
EA and DICE have promised three more Battlefield 1 expansion packs including In the Name of the Tsar, Turning Tides and Apocalypse. Each will come with a unique content.
In the Name of the Tsar will bring the Russian Army and six new maps to Battlefield 1. It will be the biggest Battlefield expansion ever and it will be released to Premium Pass holders in September.
In Turning Tides, players will "participate in the amphibious warfare of WW1 and engage in the daredevil Zeebrugge raid, the Gallipoli Offensive, and more." Turning Tides will be released for Premium Pass holders in December.
And finally, in Apocalypse, players "will go over the top in the most infamous battles of WW1" and "conquer bitterly contested ground with brutal tools and unique weapons."
Apocalypse will be the last Battlefield 1 DLC and it arrives in early 2018.