First off, I love what you're doing with this mod. That said, there are a few things that I'd like to say for constructive criticism, to make the mod even better. Now, the first problem I had during the game I am currently playing as America was with the Constitution Class Frigates. I can see that you chose a Galleon model for the appearence, and this is histrically inaccurate. As you named it, it IS a frigate, so just use a normal Frigate model but maybe just Star-Spangle it. Also, its capabilities are greatly exaggerated. Let's just say, a frigate should never be able to succesfully fight a steam powered battleship as the Constitution can. I recommend keeping ranged strength at the standard level for frigate units, let it come with a naval combat bonus and the golden age points, make it about 10-20 pts stronger than a normal frigate, let it replace the Frigate for America, and drop the unit cap. Next, the naval unist in the atomic and information age seem to have very arbitrary attributes, and some simply are inconsistent. For example, an inormation era aircraft carrier may move 20 tiles per turn, where all of the other ships have normal movement speeds. It makes no sense to basically force the carrier to either abandon its escorts or ignore its capabilities, might wanna do some scaling there. This brings me to the air units issues. Either decrease the range of early aircraft or increase the range of modern aircraft, because under no conditions do a fighter jet and a WW2 era fighter have the same range. I would just flat out get rid of a lot of those WW1-2 aircraft because a lot of them are just there and don't really have any purpose. Strategic Jet Bombers are awesome, but I would just standardize the model to be the American B-52 and give them the same stats for everyone. SOMETHING IS WRONG WITH THE SEA SPARROW MISSILE, SOMETHING IS VERY WRONG. The AI prefer the Sea Sparrow to literally every other aircraft. I have seen a stack of 92 SEA SPARROWS IN CITY. Something needs to be done about those. Oh, and some minor things, such as upgrade paths, need to have some logic applied to them. In the realm of air and sea units especially, in many situations to stay modern you either have to build the most modern unit or wait an unreasonably long while to upgrade. For example, my Ironclads could not upgrade to Wickes Class Destroyers. I also recommend replacing the American Corvette naval unit with a Destroyer Escort, mostly so they aren't British ships with the HMS designation. I think that just about covers it for now. Everyone feel free to leave suggestions and such here so that they can be found easily.