Holy Roman Empire
French satellites and subdued former enemies:
The War of the First Coalition (French: Guerre de la Première Coalition) is the traditional name of the wars that several European powers fought between 1792 and 1797 against the French First Republic. Despite the collective strength of these nations compared with France, they were not really allied and fought without much apparent coordination or agreement. Each power had its eye on a different part of France it wanted to appropriate after a French defeat, which never occurred.
France declared war on the Habsburg Monarchy (cf. the Holy Roman Empire, Austrian Empire etc.) on 20 April 1792. In July 1792, an army under the Duke of Brunswick and composed mostly of Prussians joined the Austrian side and invaded France, only to be rebuffed at the Battle of Valmy in September.
Subsequently these powers made several invasions of France by land and sea, with Prussia and Austria attacking from the Austrian Netherlands and the Rhine, and the Kingdom of Great Britain supporting revolts in provincial France and laying siege to Toulon in October 1793. France suffered reverses (Battle of Neerwinden, 18 March 1793) and internal strife (War in the Vendée) and responded with draconian measures. The Committee of Public Safety formed (6 April 1793) and the levée en masse drafted all potential soldiers aged 18 to 25 (August 1793). The new French armies counterattacked, repelled the invaders, and advanced beyond France.
The French established the Batavian Republic as a sister republic (May 1795) and gained Prussian recognition of French control of the Left Bank of the Rhine by the first Peace of Basel. With the Treaty of Campo Formio, the Holy Roman Empire ceded the Austrian Netherlands to France and Northern Italy was turned into several French sister republics. Spain made a separate peace accord with France (Second Treaty of Basel) and the French Directory carried out plans to conquer more of the Holy Roman Empire (German States, and Austria under the same rule).