The Proving Grounds
From Halopedia, the Halo wiki
The Proving Grounds is a multiplayer map in Halo Wars 2. The map is exclusively playable in the Blitz gametype, and was included in the second beta of the game. This map is also used for Blitz Firefight.
The Proving Grounds is set on Installation 00, and is largely symmetrical. Each side of the map has a team base, and the centre is dominated by three control points - A, B and C.
With the May 2017 multiplayer update, two new visual themes were added for this map:
Desert/Tropical visual variant of The Proving Grounds.
Nighttime visual variant of The Proving Grounds.
Players have a random chance of playing on any of the three variations of The Proving Grounds in the Blitz PVP and Blitz Firefight playlists.