What was the relationship between World War 1 and World War 2 and what were the diffences in the way the wars were fought?

Answer 1

The thing tying WWI to WWII was likely the peace or Treaty of Versailles, that banished the German (and Austrian) monarchy, split up Germany into several nations (Poland for one) and laying extreme restrictions and reparations on Germany, creating enhanced unrest and dissent within Germany, clearing the way for extremists in government. The difference in the way they were fought were the introduction of airpower and armour/mechanization. WWII is known for it's mobility in fighting, best represented by the German "Blitzkrieg"-doctrine. However, WWI was also a very mobile war at first, but quickly stagnated into a war of attrition. WWII also became a war of attrition, but with the advent of airpower and tanks, static defence became much harder to maintain and thus less visible. It should be noted that the eastern front in WWI was also very mobile throughout the war.