How does the Alliance debuff work during Alliance war?

On the second day of an Alliance War event, Alliances will be able to attack and take over each other alliances' Sanctuaries. The Alliance that holds an enemy Alliance's Sanctuary will begin receiving troops debuffs that increases over time. This debuff will be applied to any Troops stationed in that Sanctuary and will increase continuously every 10 minutes. By the 60 minute mark the debuff resets back to 0 and begins again.