Early images from Call of Duty: WWII on Reddit have revealed that Season 1 of Ranked Play in Call of Duty: WWII will begin on December 1. There is no pre-season for the Ranked Play, so Ranked Matches will not be playable until Season 1 begins Dec. 1.
The message says:
Season 1 Kicks off on December 1, 2017. Ranked Play is a multiplayer game type where you compete in seasons and rank up through seven tiers to prove that you are one of the best in the world. Battle in competitive rule set and move through the ranks to earn exclusive Ranked Play seasonal rewards. Become one of the Top 100 players at the end of a season to earn your Pro status!
Season 1 Kicks off soon so gear up, fight hard, and be ready to compete starting December 1.