These units, termed 'creeps' are spawned every thirty seconds, and run along their lane until they meet opposition - which they then attack. Bases are strongly defended with extra defensive towers, and buildings from which units spawn. Defensive towers are positioned evenly through each lane, until the lanes terminate at a team's base. The standard map is split into three continuous 'lanes' (Two in one of the lesser-played maps), running from one base to the other. Both teams are based at opposite sides of a map. Heroes of Newerth puts two teams of players against each other: the Legion and the Hellbourne.