Do not watch this series expecting a comprehensive study of both World Wars a la Ken Burns's Civil War. It's not. However, it presents a cause-and-effect survey of how connected the two wars were.
First the negative: This program focuses on a few key figures yet totally omits any mention whatsoever of Eisenhower. How do you cover D-day without at least mentioning the name Eisenhower? Eisenhower was the ONLY 5 star general, yet two others in this program erroneously wore 5 star insignia.
Positive: Jeremy Renner did a great job narrating. The series is educational and worth watching. Although it's imperfect, I learned a few things from this series. I like how it treats both World Wars as one conflict because it was. The Treaty of Versailles wasn't a peace treaty at all and set the stage for resumption of fighting.
This series will leave you hungering for more, in depth programs that once were offered by The History Channel before they chose to waste our time on such nonsense as Pawn Wars.