Editing Did you know X - Special mechanics

Collection of rules/mechanics easily or often overlooked.

= Rules / Mechanics =
* "Marry family" generates new family members, if there are no suitable candidates. An ignored candidate is not added to the family though.
* Workers from another family take one turn more to build an improvement, thus consuming 1 extra order.
* Horses give instant 250gold, if destroyed by a urban building.
* Generals get the same XP as their unit, which is an option to level them quickly. (XP from Discipline doesn't count)
* Family religion is based on the number of followers in the family. The religion with most followers will become the family religion. The families head counts twice.
* Invisible units (Schemer Scouts!) can enter truce-neighbour borders.
* Resource gain from taking a barbarian or tribe site (source Dev Solver on discord): Depends on the improvement level. Hovel is food/iron/stone. Outpost is food/iron/stone/wood. Encampment is food/iron/stone/wood/money. Bastion additionally has a +5 orders possibility
* It is possible to "swap" a tile between two cities by placing any unit on it an "buy it for XY". It costs money and bad reputation for the family who loses the tile.

= UI =
* There is an overview of all cities you got an agent network in -- click the agent icon on the top right of the city tab in the screen's top-right to access it. 

= Formula =
* Power: 
the sum of all science you generated thus far, divided by a hundred
+ your number of cities multiplied by 10 (so half base hp), +1% per game turn
+ the sum of city HP provided by projects (walls, moats etc)
+ the sum of naval military unit strength multiplied by 2
+ the sum of land military units multiplied by 3 

= Call to contribute =
* ... add your observation ...