France and Germany are the two most core land power countries on the European continent, and there have been "one-on-one" armed contests, and they have united with other European helpers, and there have been many times of group fights.
First of all, the Franco-Prussian War in 1870, although it was only fought for one year, but France, which experienced the trauma of the Napoleonic Wars, was superficially strong, but in fact it was strong in the middle, and the war completed the unification of Germany and the displacement of European hegemons.
If the sayings and Germanys took sides and jointly negotiated with other European countries, it would be even more. France and Germany were opposed to each other, and in the large-scale war, the first to be a scuffle was the Thirty Years' War of 1618-1648, when Europe was in a Renaissance, the religious conflict between Protestantism and Catholicism intensified, and Prussia under the Habsburg monarchy was divided into two, Protestant and Catholic countries were allied according to faith, and France was also involved. Thirty years of war to the most tragic time, almost all countries in Europe participated in the group fight, including Sweden, the Czech Republic, Denmark, the Netherlands, France, Scotland, Britain, Spain, Austria, etc., as long as there is a religious difference and conflict in any piece of land, it is difficult to be spared, the history is called "Christian War", the result of the war determines the current belief pattern in Western Europe and Northern Europe, Germany and Britain believe in Protestantism, while other countries believe in Catholicism.
In the Seven Years' War of 1756-1763, France and Germany also fought each other. Germany united with Britain against France and Austria, and the seven-year war suffered heavy casualties, with more than 900,000 casualties in the countries involved. In addition to the Thirty Years' War and the Seven Years' War, during the Napoleonic period, in the European Anti-French Alliance, the Prussian army has always been anti-French fighters, the anti-French core of the Three Emperors' Alliance, and the famous Rhine Battle took place in Prussia. In addition, in modern warfare, the main battlefield of the Western Front of the First World War took place in the north of France, the war was extremely tragic, the entire northern part of France was almost beaten into a sieve, and the casualties and missing numbers of French and German troops exceeded 5 million. Twenty years later, the Second World War was replaced by the fact that all of Germany was fought by the Allies on the french side, and Germany fought to the end. The above was a major war in which Germany and France participated, with millions of casualties.
In addition to the great war, the friction between France and Germany is even more difficult to count, such as the Moroccan crisis and the Balkan war, which can be seen more or less as a pair of "lever spirits". Therefore, the feud between France and Germany is too deep, sometimes because of religious disputes, sometimes for the hegemony of the European continent, in the modern period of about 150 years, only France and Germany, the total number of casualties involved in the war has exceeded 10 million respectively, which is the strong labor of the country's pillars, a war, the country is broken, completely crippled, just because the lesson is too tragic, France and Germany, no longer dare to easily provoke the end of the war.
After the end of World War II, In 1951, France and West Germany abandoned their past prejudices and re-stood in the perspective of economic interests to jointly establish a European coal and steel community, which is the origin of the current European Union. I believe that as long as France, Germany, either side does not take the initiative to withdraw from the European Union, or the United Kingdom that stirs up the, does not blow between them, the Franco-German war is difficult to see within one or two hundred years. After all, war is a continuation of politics, and what can be obtained at the negotiating table, why go to the battlefield to grab it.