In this lesson, students, analyzing various primary sources, will examine how certain nations perceived the assassination of the heir to the Austro-Hungarian throne and how they prepared for war. One group will focus on the Austrian point-of-view. The second group will pay close attention to the German perception. Group three will analyze the division within the United States on entrance into the conflict. The fourth group will analyze the British viewpoint. The fifth group will examine the Russian response to the assassination. By the end of the lesson, students will realize that the cause or causes for war will vary between belligerent countries.