Normandii was the northernmost and most autocratic of the Gallic states, and - at least initially - the most brutal toward its citizens. While it is most known for its autocracy, it was also a thriving economic power. Not only that, but the nation also had several prominent explorers, who paved the way for expansion and trade with less centralized tribes. Like the other Gallic states, it would form into the Gallic Empire in 13 AD, but it would remain an important city in the new Empire.
The Three Kings
After Normandii was formed, the first three kings put the nation through a lot of different kinds of government. The first king, Swedarc I, formed what is probably the most corrupt an totalitarian government ever seen in Gaul. This regime was brutal, but economically successful, and lasted until Swedarc I died. His son and successor - Swedarc II - was far more liberal and set up a semi democratic government. This led to the creation of a senate and other institutions, as well as minor economic growth. After Swedarc II died, another Swedarc took the throne. This one, however, took after his Grandfather, and tried to bring as much power as possible to himself. In the end though, Swedarc III failed at his mission, and the Normandiian Senate survived.
During and after the era of the three Kings Normandii was well known for its various expeditions. These were generally funded on the hopes that they would open up additional trading routes. This was usually a successful gamble, and Normandii became a hub for trading with the less centralized eastern and Germanic tribes. Not only that, but they helped plot the course of rivers, and the general geography of Gaul. Overall, the Exploration would become a hallmark of Normandiian culture, and help them in many economic areas.
Gallic Unification War
Of the defending Gallic states, Normandii was probably the most invested in the war, fighting in at least some capacity for every front. The attempted counter offensive in Paris was largely organized by them, and despite its ultimate failure, it was an admirable effort given the resources the nation had available. Even after Parius was secured, Norman troops fought the Orleanian army effectively, inflicting more causalities than the Brittoric and the Parisians combined. This made Normandii by far the hardest area to capture, and at one point, Orleans almost gave up due to excessive casualties. While they were eventually subjected, Normandii's independence streak could continue, and they would go on to start several revolts against the Gallic Empire, including the one that eventually destroyed it.
Even after Swedarc I and Swedarc II, the Normandiian government was plagued with corruption. This was extremely clear with the Senate, and the police force they employed. The police would often completely ignore the Senators, focusing their attention on the people who didn't pay them. While the corruption was most clear in that scenario, the one that did the most harm was probably the bribes the senate often received to pass or stop laws. Despite these problems, the system did lumber on, though it quickly collapsed during the Gallic Unification War.
Despite, or perhaps because of the corrupt government, the populace was generally pretty self sufficient. Because of the minimal limits on trade, it became relatively easy to make huge amounts on the industry. Unlike Orleans however, those who failed to make a living were generally left out on the streets to starve. This minimized social activity, though several taverns and other forms of entertainment flourished at various points in history. In addition, because of Normandii's avid exploration, cartography was a popular hobby, at least among the wealthy.