AKA "Napoleonic Wars"...
and basically the driving force behind almost all
major war after 100 year war and up to World War II was one country, France, and its european ambitions for hegemony. IMHO. Its natural given the fact that with the winning of the 100 year war, France become the most potent of all european states. It lost this status with the catastrophic results of the Franco-Prussian war in 1870, and the boogeyman of Europe become Germany, the new industrial-military giant of Europe. The driving force between World War I and II were largely France willingness to contest this new situation - without any success in long term.
We live in peace now because France wisely accepted the new status qou after 1945.