Abstract: A game system may receive an attack by a first player against a second player. The game system may notify a third player of the attack and provide the third player the option to intervene. The game system may notify the second player of the attack and provide the second player the option to mitigate damage from the attack. The game system may notify the third player based on their status as guildmates, neighbors, or connection in a social network with the first player or the second player. The option to intervene or mitigate may be available for a limited period of time. Responding to the attack may add units to the battle, reduce damage taken, or generate other benefits.