From Halopedia, the Halo wiki
Fort Jordan features of up to 3v3 battle with total of 14 base slots available (6 main base, 8 outside main base). Player will be contesting against each other to dominate the map, lay siege, and destroy their base respectively. There are a total of 3 power nodes that can be contested to gain more resources, the middle of the map provides a chokepoint that can be utilized as a killzone. The side of the map was closed by an impassable barrier as all players must pass through the center of the map to reach other bases respectively.
The game is only available at custom games, as there are more updates to come.
Fort Jordan was created by 343 Industries employee Matt Jordan as a personal project, in-between working on updates for Halo: The Master Chief Collection. Jordan originally tried out prototyping and bringing Blood Gulch into the game in January of 2018, but the map had problems and was scrapped. Fort Jordan was then built using Fort Deen's original map geometry, but scaled up to allow players more room to move their armies. The map was released in a free title update on February 26, 2019, though limited to custom games-only while the map underwent additional tweaking. Ultimately, the map was never finished and released into matchmaking.