Technology
Household Troops
The muhafaza branch's mastery node (tier 5); its prerequisite is The Hearth, and it can only be researched if you have chosen muhafaza as your doctrine — if you have chosen another branch's doctrine, this node stays locked forever (Research and the tech tree).
Unlocks nothing, gives a passive
kapikulu unlocks no building or unit; it carries a single passive, seen in the table above's Effects row, and it kicks in the moment it is known: if one of the infantry types (Spearman, Janissary, Archer) is raised in a city that has a Barracks, it is born with an extra starting experience share on top of the Barracks' own share (Experience and promotion, "Starting experience"). For infantry raised in a city with no Barracks, this extra is also zero; because Sipahi, Artillery and Forlorn Hope do not count as infantry, they never get a share of this extra.
When to research it
This is a late-game node: you need to have finished the four tiers ahead of it (Banners, Healing, Fieldworks, The Hearth) and firmly committed to the muhafaza doctrine. For a playstyle that has already built the Barracks and keeps raising its infantry in those cities, this node's payoff is the largest — it has no return at all for a unit born with no Barracks.
The numbers on this page are read from the game’s balance tables.