It is common for one war to lead to another. Often, one war creates so much ruin, another war follows as an attempt to "rebuild" after the devastation of what happened before. The four-year-long First World War (1914-1918) left the world unstable and uncertain of what would come next after the devastation of that war. While World War I caused problems for the world, the instability of the nation after World War I led to a war that proved far more destructive than anyone could have imagined. There were multiple causes for World War II and it is difficult to determine which had the greatest impact on the creation of the war, although most would agree that Adolf Hitler's involvement throughout the years preceding the Second World War was one of the greatest. causes of war and Hitler was involved in multiple causes of World War II. But Hitler is not the only cause of the war. The failure of appeasement, the Treaty of Versailles, the failure of the League of Nations as well as the financial depression also caused the outbreak of the Second World War. All of these causes ultimately created devastation for the world with the creation of World War II. One of the causes of World War II was Hitler's invasion of Poland, which caused Britain to declare war on Germany, and thus marked the start of a war that would destroy more land and more lives than any war before it. Although many people might argue that the Treaty of Versailles was the primary cause of World War II, others believe that Adolf Hitler's aggression and the need to expand was the primary reason why the war broke out on September 1, 1939. As a history guide. org states, Hitler was possessed by his ideals and ideas about the world which he felt necessary...... middle of paper ...... World War II, it also didn't help that the League of Nations failed and the idea of ​​appeasement did not work. It is not really possible to assign full responsibility to any one of these causes, as they all led to the outbreak of World War II. An important part of the causes of World War II, as well as the war itself, is that the nation was able to figure out what couldn't work. There are times when people simply cannot be trusted, and even a treaty that seems important can still be challenged. Furthermore, although it would be desirable to resolve disputes peacefully, this option is not always effective. As the manual states, the world was at a point where "war and peace were juggling" (AFR 181). One of the best things that came out of the war was that the nation learned these things and, in turn, found new tactics to deal with conflicts around the world..