Season 3 (Halo Wars 2)
From Halopedia, the Halo wiki
Season 3 was the third season of Halo Wars 2 to launch, beginning on May 22, 2017. The season followed Season 2 and was succeeded by Season 4 on June 28, 2017. The season launched alongside the release of the leader Sergeant Johnson; as such the season's emblem is represented by a the Sergeant's HRUNTING/YGGDRASIL Mark I (J) Green Machine.
Season 3 Title Update
May 22 patch notes
This update will launch in conjunction with the next DLC leader and includes a variety of fixes and improvements. See below for the full details. Note: There is no balance update scheduled for this next release. The latest balance update occurred on May 5, please see this post for details.