Another difference is the manner in which random battles are encountered. Like other "Final Fantasy" games, random battles occur on the world map. However, in "Final Fantasy Tactics", random battles happen only in pre-set locations, marked in green on the world map. Passing over one of these spots may result in a random encounter. Another major aspect of battles is magical attacks. Certain magical attacks cause area of effect damage, and many of the more powerful magical attacks require several turns of charging. Hit Points of enemy units are also visible to the player (except in the case of certain bosses), allowing the player to know exactly how much damage they still have to inflict on a particular unit.