Keep (Warcraft II)

In large and well-defended settlements, the Keep replaces the Town Hall as the center of commerce where Peasants can deliver shipments of gold and lumber for processing. The artisans who dwell here have mastered means of better extracting the gold from the ore mined by the Peasants, thus increasing the yield of mining operations. The Keep is also a military structure protected by high granite walls, making it difficult to destroy. Advancing legions of Orcish warriors force the Alliance to assign their elite troops - the Knights of Lordaeron and the mysterious Elven Rangers - only to such places, where their presence will serve to deny the Horde further strategic gains. As control of these towns becomes more critical, the Keep may need to be upgraded into a Castle.

• A Keep is an upgraded Town Hall. It allows you to build Stables and Gnomish Inventors and has 200 extra HP.
• It also makes your gold mining more efficient: whenever a Peasant delivers gold, 110 gold will be added to your stockpile instead of 100. Note that merely having at least one Keep is enough - you will get the bonus gold even if the peasant delivers it to a Town Hall somewhere else on the map.

• Keep (Warcraft III)