The war with Spain went fairly smoothly thanks to America’s technological advantage. Once catapults battered down cities’ defenses, riflemen could take out the longbowmen that were still Spain’s best defenders relatively easily most of the time, and older units could mop up what was left. Barcelona fell, and then Seville (which proved to be the most costly city to capture), and finally Madrid. Germany re-entered the war shortly before the fall of Madrid, and it was probably they who razed the last Spanish city.
Long before the war was over, America shifted mostly back to a peacetime production status. Research continued, pushing through to Biology and Physics before going back for Nationalism and Constitution. Next came Corporation and the Assembly Line, which brought about massive construction of factories and coal plants. By the dawn of the Modern Era, America had Artillery, Democracy, the bottom techs through Combustion and, to enter the new era, Radio. With research proceeding rapidly, and with a lot of techs that give access to wonders becoming available around the dawn of the modern era, wonders have started to sprout all over the nation. Near the end of the Industrial Eera, America made what will probably be its final civics changes, adopting Universal Suffrage and Emancipation.
In the aftermath of the war with Spain, I found something else I really hate about Civ IV’s design. After I took Seville, Germany’s borders almost immediately expanded to largely encompass the city, and the city went through a series of riots that ended in its defecting to Germany. Having it be that easy for a city to flip to a third party in the aftermath of a war is neither fun nor realistic. It ought to take time for German culture to expand through the formerly Spanish territory to reach the city, time in which the new owner can build up culture in the city to defend against the encroachment.
America also started settling the islands to the southeast, with two cities on the larger island and one on the smaller one. Germany founded a city on the larger island as well, and the rest is enough of a frozen wasteland that America probably won’t bother with i - unless, perhaps, I decide to use it to put me a bit closer to the domination threshold.
The American Empire now has almost 45 percent of the world’s population and about a third of its land area (using F8 statistics), and F9 shows about three and a half times the GNP and more than eight times the manufactured goods of the average AI. America actually has significantly more manufacturing power than the rest of the world put together! With a large tech lead and that kind of production, I’m starting to think I may try for a domination victory.
The screenshot below is of what used to be Spain.