Firstly, I've played maybe a half dozen campaigns as the CSA on various settings and had thought that I understood the AI's methods, but playing my first campaign as the Union, I find that the AI is MUCH more aggressive as the CSA than she ever is as the Union. (Think Polk invading Ohio and Indiana in 1861 and think fighting the Siege of Chicago in 1862!)

The settings are normal aggressiveness, give the AI extra time, and the 1 point activation bonus. Normal fog of war.
Even with the generally higher strategic ratings of the CSA generals along with the 1 point activation bonus of the AI causing them to activate more frequently, the level of aggressiveness seems to be terribly high. And where in the WORLD does the AI get the resources to create all these forces?? Any insight into this would be appreciated.
The next question is probably 'trivia'. On the unit stats, there is a rating for 'protection' and references to increasing this in the manual and the wiki in various places. Generally, it appears that infantry and cavalry have protection ratings of 1 or 2, while artillery, service units, and naval forces have zero. What is this rating, what does it represent, how do changes to it affect the resolution of the battles and so on?
Third question, somewhat more substantive. As the Union, Transport ships in the Atlantic Shipping Lanes bring back money and war supplies. It appears from what I've seen, that a transport, stacked together with frigates, steam frigates, or other 'warships' provide supply, i.e., the supply levels of the warships are static at whatever level they were at when the transport joined and the supply level of the transport reduces slowly until it's out. So that it appears as though the warships are drawing supply from the transports. I've also seen this behaviour as the CSA in the Gulf Blockade box. Is this working as designed? It would seem that this would be an advantage for the Union, as one could keep the warships on station a lot longer. (Although the same holds true for the CSA, at least in the Gulf blockade, though I'm not sure I'd want to try putting a transport in the Atlantic box.)
Fourth, from what I've seen, the AI pretty much seems to ignore the Naval aspects of the game. Whatever naval forces are there to start, or created by event get used, typically as bombardment of forts, but beyond that, no invasions, no riverine campaigns, no major ship builds, or anything like that. Is this typical? It would seem to me that one of the biggest advantages the Union had was it's fleet. Particularly in the area of blockade. I believe I recall in the manual a passage about blockade of Southern ports reducing the creation of supply, ammo, and war supplies with a complex formula. But playing as the CSA, I do not recall seeing this effect.
Lastly, I've seen a reference in at least one of the posts here to putting transports in the gulf blockade box and reaping tons of money and war supplies. I don't observe this behaviour when I tried it. (The behaviour I do see is that I can pretty much forget about having to resupply the brigs). Is there some 'magic' that has to be associated with this? Maybe putting a warship there, or running the transports to a specific port in one of the Caribbean boxes or something?
Thanks in advance for any help or insight anyone can offer.