Hmm, let's see:
Horse riding/ tending/ horseshoes
Sailing/ ship building/ ship types/ sea battle strategy
Tai Chi/ Kendo/ jujitsu
Gunpowder/ Metallurgy/ Alchemy
Swordsmithing
Construction
Weaving
Textile production
Carriages
Barrel making
Brewing
Volcanoes
Oceanic tides/ streams
Feudal societies
French history/ Joan of Arc
Viruses
Dyslexia
Animal Behaviour
Dimension theory
Decomposition
Fire building
Hunting
Fletching/ bow making
Gem appraising
Military history
17th Century field medicine/ broken bones/ arrow wounds
Herbalism/ poultices/ sterilisation
Runic languages
Travel speeds (walking/ horses/ ships/ army)
Road building
Bridge building (and collapsing)
Insect behaviours/ swarm instinct
Erm, I'm sure there is more, but as you can see I'm a bit of a stickler for detail. However, one thing to be mindful of is: just because you know it doesn't mean it should be in there.
