The causes of World War II are complicated. The immediate causes of World War II are generally held to be the Japanese attacks on China and the British and Dutch colonies, and the German invasion of Poland on the 1st September 1939. Following the two day deadline for the withdrawal of German forces, the United Kingdom, Australia, and New Zealand declared war on Germany, followed quickly by France, South Africa, Canada and Nepal. | The causes of World War II are complicated. The immediate causes of World War II are generally held to be the Japanese attacks on China and the British and Dutch colonies, and the German invasion of Poland on the 1st September 1939. Following the two day deadline for the withdrawal of German forces, the United Kingdom, Australia, and New Zealand declared war on Germany, followed quickly by France, South Africa, Canada and Nepal. |