https://www.gamespot.com/articles/new-xbox-one-backwards-compatible-game-now-availab/1100-6459183/

Battlefield 1943 is the latest to be added to Xbox One's backward compatibility list. The 2009 game was a value release that was only distributed digitally, but it picked up a strong following thanks to delivering lots of the Battlefield experience in a smaller package.

Larry Hryb (aka Major Nelson) announced the addition via Twitter. As always, if you already own 1943 on your current Xbox Live account, it will be populated into your collection automatically. Meanwhile if you don't already own it, it's available for $10 / £10 / AU$15 on the Xbox Store. It's also now available in the EA Access Vault.