When was Dieppe, France founded?
Dieppe
First recorded as a small fishing settlement in 1030, Dieppe was an important prize fought over during the Hundred Years' War. Dieppe housed the most advanced French school of cartography in the 16th century. Two of France's best navigators, Michel le Vasseur and his brother Thomas le Vasseur, lived in Dieppe when they were recruited to join the expedition of René Goulaine de Laudonnière which departed Le Havre for Florida on April 20, 1564. The expedition resulted in the construction of Fort Caroline, the first French colony in the New World.[6] Another expedition two years before where Goulaine de Laudonnière was under command of Jean Ribault, a local Huguenot captain, had resulted in the foundation of Charlesfort, now in South Carolina. Dieppe was the premier port of the kingdom in the 17th century. On July 23, 1632, 300 colonists heading to New France departed from Dieppe. At the Revocation of the Edict of Nantes in 1685, Dieppe lost 3,000 of its Huguenot citizens, who fled abroad.
Mainz
In 1797, the French returned. The army of Napoléon Bonaparte occupied the German territory to the west of the Rhine, and the Treaty of Campo Formio awarded France this entire area. On 17 February 1800, the French "Département du Mont-Tonnerre" was founded here, with Mainz as its capital, the Rhine being the new eastern frontier of la Grande Nation. Austria and Prussia could not but approve this new border with France in 1801. However, after several defeats in Europe during the next years, the weakened Napoléon and his troops had to leave Mainz in May 1814.