Austria-Hungary declared war on Serbia for presumably harboring the terrorist
organization which assassinated Archduke Franz Ferdinand. Germany backed her
ally Austria to the limit, Russia mobilized in the hope of protecting her small ally, and
Germany declared war on Russia and on France, Russia's ally. German armies
crashed through neutral Belgium to crush France; and Britain, honoring her pledge to
defend Belgian neutrality, declared war on Germany
- excerpt from American Pageant, 3rd edition
Which of the following causes of World War I is being discussed in the excerpt above?
O imperialism
Onationalism
Omilitarism
O alliance system



Answer :

The excerpt discusses the cause of World War I known as the "alliance system." Here's an explanation: 1. **Alliance System**: The alliances in Europe before World War I were intricate and divided the major powers into two main camps. Germany backed Austria-Hungary, while Russia supported Serbia. When Austria-Hungary declared war on Serbia, Russia mobilized to protect Serbia, leading Germany to declare war on Russia. This domino effect of alliances drew more countries into the conflict. In summary, the excerpt describes how the interlocking system of alliances, where one country's actions triggered responses from its allies and their allies, played a significant role in escalating the conflict and ultimately leading to the outbreak of World War I.