Lumber mill Lumber mills are structures used by several races to process wood into usable lumber . Alliance lumber mills . Human lumber mills . During the First War , this is where the raw wood supplied by peasant harvesters was made into building supplies , arrow s , and catapults . The ability to craft wood to the specific shapes and sizes needed to make certain buildings makes them an essential part of your community . The lumber mill can also provide your archers with better shafts for their arrows that will make them fly truer , and increase the amount of damage that they inflict . During the third war , the master masons of the human lumber mills strive constantly to improve structural integrity . The site is also a processing mill for lumber harvested from the surrounding landscape . The wood harvested is used in everything from raw building materials to weapon handles . Elven lumber mills . During the second war , seeking insight into the mysteries of the great Ironwood tree s of Northeron , the elves of Quel ’ thalas constructed lumber mills where they became exceptional craftsmen . The elves offered their superior skills in service to the Alliance , providing more efficient means for processing lumber . The production of ships and war machines becomes possible with the addition of these structures . Lumber mills are also responsible for producing the perfectly crafted arrows that make the elven archers feared throughout the Horde . When given the necessary resources , Elven craftsmen will upgrade the quality of these arrows , thus increasing the possible damage that can be inflicted . Elven rangers , after being trained at the barracks , have been known to gather at the mills , honing their skills in Longbow , Marksmanship , and Scouting . Lumber mills run by the high elves helped fend off Arthas as he tried to attack their capital Silvermoon and Quel ' thalas in Warcraft III by serving as a returning point for lumber . The blood elves use a similar lumber mill in the Frozen Throne expansion campaign in Warcraft III . It cannot be built by the " High Elf ( Worker ) " probably due to the limited ability of the map editor prior to the Frozen Throne expansion . With the Frozen Throne expansion map editor , it is possible to make additional groups with building orders . Blood elven lumber mill . The lumber mill helped the blood elves and Kael ' thas in the " Warcraft III : The Frozen Throne " human expansion campaign . Horde lumber mills . Orc lumber mills . This is where the roughly cut wood supplied by the peon laborers is made usable by skilled workers for building s , spear s , and catapult s . If other orcs require specific woods for their sites , only your lumber mill will have the necessary workers to complete the task . When funds are directed to the craftsmen of the lumber mill , they can increase the quality of your spears , making them bite even deeper into the hide of the human scum . Troll lumber mills . Carved from the husk of an ancient Ironwood tree , the troll lumber mill is a vital part of the Horde ’ s lumber processing operation . The trolls , having lived in the forests of the far north for centuries , have devised a unique method of harvesting . By treating a group of trees with a volatile alchemical solvent , the trolls can deaden and weaken large sections of wood . Though it is extremely hazardous to peon and earth alike , this site makes the process of cutting lumber more efficient . Trolls have become quite adept at fashioning a special sort of throwing axe . The crafting and use of this weapon is always being honed to perfection . Troll berserkers frequent the Ironwood trees to digest potions given to them by the goblin alchemists stationed there . These potions enable them to throw their axes greater distances or sharpen their sight . It is also said that the speed at which healing occurs is increased if the correct potion is ingested . This process of regeneration is one of the most distinct and unbelievable powers of the troll berserkers . World of Warcraft lumber mills . Lumber mills can be found all over " World of Warcraft " either abandoned or run by various factions .