Some form of peace has existed in Europe due to the delicate power balance. However due to the rise of Militarism, and imperialism nationalism the balance, which existed in Europe was heavily distorted. Therefore, many countries were fearful for an attack. So most countries held secret meetings to discuss classified mutual defense alliances, to protect each other against threats. Because once a country was attacked or threatened, the allied countries would come to their aid. When after the the assassination of Archduke Franz Ferdinand, Austria Hungary declared war on Serbia, Russia declared war on Austria Hungary to protect its ally. On the other side, Germany was an ally of Austria-Hungary and therefore declared war on Russia. Since France was again an ally of Russia, France declared war on Germany. When Germany crossed through neutral Belgium, to launch an attack against France, Britain joined the war since it had an agreement with Belgium. The collapse of the complicated structure of alliances caused more than 100 countries to participate in the war, even as far away as Japan, Bolivia, Canada and…