RTW BI unit tech trees ???

[Omanes Alexandrapolites]

Hi and welcome Theodoric,
Don't worry, no need to hunt! The great R:TW comes with a nice set of tech-trees for each individual settlement! To open up a tech tree you first need to open up a settlement details scroll, just double click on a settlement and it will open up. After that you need to click on the highest button, the one with a mathematical compass on it, on the far left.
Then, as if by magic, the tech-tree shall appear before your eyes!

Simply right click on something to see what it does/trains/doesn't train.

Hope this helps you, cheers!