The alliance system pulled one nation after another into the conflict. or The biggest reason was the existence of the European Alliances. Countries were pulled in due to alliances with other countries The alliance system was a primary reason why many European countries were pulled into conflict. Germany, for example, was obligated by a treaty to support Austria-Hungary.
Three countries.....India , China and Pakistan
Probably all of European countries.
some countries supported Austria-Hungary (like Germany...) and some supported Serbia (like Russia...) and then World War I started...
Spain, Portugal, and England were three European countries heavily involved in the Age of Exploration. They each sponsored expeditions to venture into uncharted territories, establish colonies, and search for new trade routes to Asia. These expeditions had a significant impact on shaping global trade, culture, and politics.
It started with a conflict between Serbia and Austria-Hungary. Russia defended Serbia (they were allies), which caused Germany to aid Austria-Hungar as they were also allies. The rest followed suit by accompanying their allies. Basically, they were allied to the countries who originally had the conflict.
so many countries...i think:)
Italy, France, Germany, England, Poland, and countries around that area.
because many countries and continents were involved in the conflict.
britain france and spain
Most European nations versus Germany.
Germany was involved in World War 2 and their was serious effects not only on most european countries but also in eastern USSR. So did WWI, for that matter.