Chaos Calls: Learning Visit - The opening does give away a bit of what's to happen in Finding Home as it's the end of Finding Home. That's there to set Al's character up in Chaos without having to make a new one.
Release of Prisoners: In the section where the main camp is attacked, after the attack Al and Joe are speaking to Colonel Bond, the next paragraph mentions the teens get down from their positions and release the prisoners. They help clean up the site.
Return Home: I mention the travel home is faster than the travel through the forest. I say that as when they bypassed Bridgetown and worked their slow way to the enemy camp they traveled in the forest amongst the scrub and trees, making their way with great care and working hard not to leave a trail while scouting ahead before moving. On the return trip they travel on the road that goes through the forest, that's open and no scrub in the way, making for a faster trip. The return trip has a lot less in the way of natural obstructions and makes for easier movement.
Chaos Calls: First Rescue - Up North, I've had a few people say that US citizens would use the term Back East when talking about going from New Mexico to Frederick. One editor raised this, so I do have the US CITIZENS use that term; but Al is an Aussie and would never say it that way, to him it would be 'up north' as a purely descriptive term, and the same for Eduardo as he's a Mexican. So, please, no more emails about Al saying up north.
Chaos Calls: Dragon Dilemma - Bearings, the bearings I use are steel roller or needle bearings in a steel race - not ball bearings. These can be cast metal. Bearings will never be common on Chaos, it's metal poor, as the metal bearings of the wagons are worth a lot. A rich person like Al can afford them for a special project.
A troop is a basic military unit and has varied a lot between countries, forces, and time periods. The earliest use of the term was for an organised group of warriors on foot. Today, more people are used to a cavalry troop. In more modern usage it varies between being the equivalent of a platoon or a company and has varied in size from around 30 to 70 members. On Chaos Al is setting up a troop to be the equal of a platoon, but with 65 members as that's what he sees as a reasonable sized force to safely act on its own. In older times military units had larger numbers than they do today - think pre-gunpowder period, please.
The carts I mention are something like a dog cart modified for use by a horse, they are only as wide as an average horse. Here's an image of roughly what they look like in real life:
http://en.wikipedia.org/wiki/File:Dogcart3.jpg