Warchalking is a small level 2 city described as being valuable primarily for its farms. It also posesses an orchard and a mill. Its defenses consist of its location on a small hill, an earthen bern capped with stones for an outer wall featuring an iron gate between stone blockhouses, and an inner garrison fortress of logs around a stone tower with a wooden roof.
The side that won the battle vs. Lord Manpower and conquered Warchalking might have been Unaroyal, because they are currently holding that city.
Real World Reference
Warchalking is the drawing of symbols in public places to advertise an open Wi-Fi wireless network.