Question

what was the Revolutionary war against PRussia and Austria

Answer 1

French Revolutionary Wars
French Revolutionary Wars, wars occurring in the era of the French Revolution and the beginning of the Napoleonic era, the decade of 1792–1802. The wars began as an effort to defend the Revolution and developed into wars of conquest under the empire. The peace obtained in 1801–2 is generally considered to divide the French Revolutionary Wars from the Napoleonic Wars, but the character of the conflict changed only gradually. 

The Origins of the Wars

The French Revolution aroused the hostility of foreign monarchs, nobles, and clergy, who feared the spread of republican ideas abroad. Émigré intrigues led the Austrian and Prussian rulers to make the declaration of Pillnitz (Aug., 1791), stating that, if all the powers would join them, they were willing to restore Louis XVI to his rightful authority. French public opinion was aroused. When the Girondists obtained control of the ministry (Mar., 1792) and Emperor Francis II acceded in Austria, war became almost inevitable. It was desired by many of the revolutionists—with the notable exception of Robespierre—who believed that war would insure the permanence of the new order and propagate revolution abroad, and by the royalists, who hoped that victory would restore the powers of Louis XVI. 

War with Austria

On Apr. 20, 1792, France declared war on Austria. The French armies lacked organization and discipline, and many noble officers had emigrated. The allied Austrian and Prussian forces under Charles William Ferdinand, duke of Brunswick, quickly crossed the frontier and began to march on Paris. The duke issued a manifesto threatening to raze Paris should the royal family be harmed. This manifesto angered the French and contributed to the suspension of the king (Aug., 1792). The comte de Rochambeau, commanding the northern sector, and the marquis deLafayette, commanding the center, resigned. Their able successors, the generals Dumouriezand Kellermann, turned the tide when they repulsed the invaders at Valmy (Sept. 20). Dumouriez advanced on the Austrian Netherlands (Belgium), and he seized it after the battle of Jemappes (Nov. 6), while Custine captured Mainz and advanced on Frankfurt.