CLAN WARS

A method of implementing clan wars is disclosed. An incentive reward is generated that is to be provided to at least one member of a group of users of a game networking system based on the group exercising a level of influence over a location during a time period that is greater than a level of influence of an additional group of users over the location during the time period. It is determined that the group exercised the level of influence over the location during the time period. The incentive reward is provided to the at least one member of the group based on the determining that the level of influence exercised by the group is greater than the level of influence of the additional group over the location during the time period.