Activision has announced a new in-game charity campaign for Call of Duty: Warzone, calling on players to run 100 virtual kilometers to earn a $1 million donation from Activision Blizzard to the Call of Duty Endowment.

The event--which is called Call of Duty Veteruns--starts May 26 and runs through June 3 inside Call of Duty: Warzone. As part of the effort, Activision Blizzard will donate $1 for every 10 virtual kilometers run on foot in Warzone, with a cap of $10 per player and $1 million in total.

In addition to helping to raise money for the Endowment, which helps place soldiers in new careers after the military, players will get in-game calling cards. Players will receive a rare bronze card for hitting 25 kms; an epic silver card for 50 kms; and a legendary cold card for 100 kms.