World War I - Which Countries Fought
After the heir to the Austro-Hungarian throne was assassinated in 1914, it was only a matter of months before war broke out. In an effort to exert control over the Balkans, Austria-Hungary declared war on Serbia. This battle was meant to be a limited one; however, a web of alliances and colonies that spread internationally led to the involvement of practically the entire world. Ultimately, the Allies would be fighting the Central Powers in a war that would directly involve approximately 63 million across the globe. In Part 2 of our series on WWI, WatchMojo.com finds out who was fighting whom during the First World War.