Whiteout Survival Tundra Arms League: the teamwork behind a roster and its matchup
Roster notifications and matchmaking give alliance coordination a clearer focus; schedules and eligibility remain State-specific.

Tundra Arms League takes Whiteout Survival alliance teamwork onto a larger competitive stage. For members preparing to enter, a roster concerns both who can take the field and how the Legion is matched, making communication about combatant and substitute roles part of the preparation.

The official help centre says Legions are paired by Matchmaking Points, which are determined by the Troop Power of the 20 strongest registered Chiefs. Chief Gear, Hero Gear and Battle Tech Power are major sources of that troop power. A matchmaking measure describes how opponents are paired; it does not guarantee a result on the battlefield.
The global October 20 update also improved role notifications during sign-up. If a Combatant or Substitute assignment changes, a notice appears the next time the player opens the event screen, showing their Legion and role. It is an in-event notice, not a promised phone push. The same change applies to Foundry Battle, making roster changes easier to follow.
Community calendar WoS Guru lists November 2–3 for battle-time voting and November 4–6 for sign-up. This is a third-party schedule, not an official timetable confirmed for every server. Global players should rely on their own State’s in-game notices for availability, eligibility and timing; this review found no officially published universal State-age or hero-generation threshold.
Whiteout Survival official October update
Whiteout Survival official matchmaking help
WoS Guru community season calendar

