Note: this answer only discusses similarities. There were of course many differences not mentioned.Both wars involved many different countries, multiple theaters of war, and extreme destruction and...
World War I started as a long chain of events that began with a small assassination. Franz Ferdinand, the heir to the Austrian throne, was murdered by a Serbian terrorist group called the Black Hand,...
Sitzkrieg (the opposite of blitzkrieg) was displayed in World War One in the trenches when neither side gained very much ground. Also shown at the battle of Stalingrad.