Some historians perceive the period of 1914-1945 as one extended European "thirty-year war.

Some historians perceive the period of 1914-1945 as one extended European "thirty-year war." On what grounds might they make this claim, and to what extent do you think this interpretation is accurate? What are some factors that might counter this interpretation?

p.s Need introduction include thesis statement, body and conclusion. Don't need to be long essay.