this system left something to be desired. Überwald's economy is apparently based on mining. Though precious metals are plentiful, the most crucial mineral resource is fat, which is believed to have been deposited by a fifth great Discworld-bearing elephant, which was dislodged from the back of Great A'Tuin and crashed into the ground around Überwald. Boiling fat rising to the surface is the reason for the country's many hot springs. Überwald effectively comprises two utterly distinct societies; the dwarfs (who exist below in their cavernous cities and tunnels), and everybody else, who lives above on the surface. By tradition, the laws of the surface people do not apply underground, and vice versa. Überwaldian dwarfs are far more hidebound and traditional than their cousins near the Sto Plains, which has led to a certain culture clash between the two (cf. marching season). Überwald is the centre of Dwarfish history and politics; the Low King, the final arbiter of Dwarfish law, has his seat of power in the underground Überwald city of Schmaltzberg (literally "mountain of fat"; a double or even triple play on the Austrian town of Salzburg: Schmaltz means lard or fat in German, but can also mean 'excessive sentimentality'). Koom Valley is a location somewhere in Überwald. Hundreds of years ago, the trolls and the dwarfs met in a battle at Koom Valley in which each side apparently ambushed the other. Nowadays, dwarfs celebrate the Battle of Koom Valley Day, on the same day that trolls celebrate Troll New Year. Sometimes, in a city where both dwarfs and trolls live (e.g. Ankh-Morpork), the two groups are careful enough to plan their celebratory marches so that they are on the same street. Some people (e.g. Susan Sto Helit), after carefully studying history books, point out that the Battle of Koom Valley seemed to have been repeated several times. The name comes from the Welsh word cwm, which means "valley". Borogravia Borogravia is located Rimwards of Überwald, on the Discworld's unnamed main continent. The capital city is PrinceMarmadukePiotreAlbertHansJosephBernhardtWilhelmsberg. Borogravia is a Duchy, and as such is ruled by a Duke or Duchess. The ruler at the time of Monstrous Regiment was Duchess Annagovia, who has achieved virtual godhood among the people. Borogravia is an extremely backward and reactionary nation, whose laws are defined by their god Nuggan. Nuggan dictates "abominations", which are things that have been banned by him, to his