https://www.techradar.com/news/they-shall-not-pay-battlefield-1s-first-expansion-is-now-available-for-free

Battlefield 1 players who didn’t purchase the first expansion for the game will doubtless be pleased to learn that it has been made a freebie for the PC (as well as Xbox One and PS4 consoles).

PC gamers can grab the ‘They Shall Not Pass’ expansion from the Origin Store for nothing, whereas it normally retails for £11.99 or $14.99. The offer is only available for a limited time, until May 15 to be precise, so you’ve got just under a fortnight to make your move.