The wars changed European military systems. Cannons became lighter and moved faster. Armies were much larger but had better food and supplies and were very large and destructive, mainly because of compulsory conscription. The French became powerful very fast and conquered most of Europe but then lost quickly after the French invasion of Russia failed.
The Napoleonic Wars ended with the Second Treaty of Paris on 20 November 1815, just after the huge Battle of Waterloo, a large battle that the French lost. Napoleon was sent into exile, and the House of Bourbon ruled France again.
Some people call the time between 20 April 1792 and 20 November 1815 "the Great French War".
On one side were the France, the Kingdom of Italy and others. On the other side were Great Britain, Prussia, Austria, Russia, Sweden, Portugal, Spain, Sicily, and others.