WWI - Write about the progression of WWI

In the year or 1914, tragedy struck. Millions lost their lives in the ordeal and cost billions. What was this tragic event? It was World War I, which lasted approximately 4-5 years. Why is it called a World War? There were many countries involved, which caused devastating effects. There are many causes that may have lead to it, but there are several specific factors. <Tab/>One factor that may have caused World …showed first 75 words of 653 total…

…showed last 75 words of 653 total…year of 1914, a war broke out. It was named World War I because of the many countries involved. The several major causes of it were imperialism, which led to militarism and nationalism, ethnic struggles in the Balkans, and the Alliance System. I believe that the major cause of it was the Alliance system because without it, there probably wouldn't have been so a large war. War is a very damaging calamity and should be avoided.