What was the main cause of World War One?
What was the immediate cause of the First World War?
What were the main causes behind the start of World War 2 and how did the world react? Why isn't the Seven Years' War considered the first World War? What were the causes of the first Gulf War? What started World War II? What were some of the causes of World War V? What was the real cause of World War 2? What brought the Second World War? What started World War 2? How did World War Two start? Who started World War I and World War II? Who started World War 2 and why? Were Germans the only reason to start World War II? What was the main reason for the entry of the U.S. into the Second World War? When and how did WWII start and end? What happened in the second world war? In which year of the First World War did Germany declare war on Russia and France? Why did the US and Vietnam War start? What was the reason behind World War II? How is the First World War remembered in Austria? What are three of the most significant causes of World War II? In which year of First World War Germany declared war on Russia and France? Why did the U.S. become involved in World War II? What were the main countries involved in World War 1? How did they got involved? How and when did WWII start and end? Where did the Battle of Dunkirk start? What impact did it cause in WWII? What were the causes of the Cold War? What were its effects? How and why did the Cold War start? What were the strengths of the Austro-Hungarian army at the beginning of the First World War? Which event was crueler, the First World War or the Second World War? Why did Russia, Germany, France and UK enter World War 1?