โ | All units gain slightly more hitpoints, particularly War Ships. | โ |
—In-game description |
Tar Kilns is a technology available in Age of Empires III: Definitive Edition - Knights of the Mediterranean that can be researched at a Trading Post or Tambo built on a House of Vasa palace. Once researched, it increases the hit points of all units by 5%, except warships which get +10%.