Battlefield 1 recently suffered a massive leak, which revealed information about the game's campaign, weapons, multiplayer modes, and more. With this and everything else we've learned, a video from March has gotten almost everything correct, except for one thing that may not have been announced yet: a pigeon mode.

YouTube user AlmightyDaq posted the video before Battlefield 1 was announced. In it, he talked about the game's maps and modes, all of which were confirmed through announcements. However, the pigeon mode, which sounds like a type of Captue the Flag, has not been confirmed.

"Pigeon functions like a flag that must be held for a certain amount of time before the pigeon flies away towards the base, carrying a message, thus scoring your team a point," he said. "It's pretty ridiculous sounding, but take my word for it. Or don't, and wait until the game is announced or the game mode is shown off."

This pigeon mode hasn't been announced or shown off, but some Reddit users believe that the leaked "Possession" game mode is Capture the Pigeon's official name. We've contacted EA to request comment and will update this article as more information is revealed.

Pigeons were used during World War 1 as a way to send messages between bases. During the war, the United States Army used more than 600 pigeons in France.

Battlefield 1 releases for PS4, Xbox One, and PC on October 21.

You can see more of GameSpot's coverage of Battlefield 1 through the links below.