The Kingdom's Turn
Like a player character’s stat block, a kingdom’s stat block continues to evolve as the kingdom expands, gathers more resources, purchases upgrades, or suffers defeats and setbacks. As the kingdom grows, the characters will need to deal with a host of situations, all of which can influence the kingdom’s stat block.
A kingdom’s growth occurs during four phases (Upkeep Phase, Improvement Phase, Income Phase and Event Phase), which represent a month in game time. When the characters establish a kingdom, pick a day of each month to resolve that kingdom’s growth and fortunes. It maybe best to select the last day of each month, so that any accomplishments the characters have made during that month can impact the kingdom’s growth.