I have been taking a course in World War I, something I know little about relative to the rest of the 20th century.
We often think of WWI as a horrible, wasteful, pointless war that solved nothing and WWII as an expensive yet "good" war that achieved positive aims. But as we approach the 75th anniversary of the Munich conference, it is interesting to note that if you ask someone in Eastern Europe, you are likely to get the opposite answer. Most Eastern European countries can date their modern statehood from the end of WWI, while WWII led to 50+ years of Soviet subjugation. WWI was their good war.