We just learned about the Abatis tree fortification.
Another type of fortification is the Trou de Loup, which is French for Wolf Hole.
This is a hole used as a trap that people would dig in front of the castle, and then cover up with something like straw or sticks so people didn't see it until they walked right on top of it.
(from: wikipedia - trou de loup)
Kid Facts - Blast from the past: Château de Chantilly
