"Old folk tales used to describe treants as wise, gentle shepherds of the forest, but recently things have changed. Since the close of the Empire War, maddened treants have turned up all over the land, mindlessly attacking settlements and travelers. My theory is that these living trees are more like the various elementals, "wood" elementals if you will, and have adopted similar temperaments. Unfortunately, once a treant goes on a rampage, the only way to stop it is to fell it like any normal tree. Such are the times we live in."