Final answer:
Some historians believe the Germans started World War 1 because they attacked the Austro-Hungarians and shot Franz Ferdinand.
Step-by-step explanation:
Some historians later believed that the Germans started World War 1 because they attacked the Austro-Hungarians and shot Franz Ferdinand. These events were considered the immediate triggers of the war. The German involvement in World War 2 is separate from their role in starting World War 1.
Learn more about Causes of World War 1