You’ve probably heard the term jarhead even if you’re not part of the military. It’s a common term for someone in the Marines that emerged around World War II.

On Jan. 3, an airstrike ordered by President Donald Trump killed Iranian General Qasem Soleimani. The airstrike came in the midst of unrest in Baghdad -- with increasing protests at the U.S. Embassy and missile attacks on American-populated bases.

There’s no easy way to tell the story of World War 2. Whether you read about soldier’s tale from the perspective of bombs and guns or you read about the citizens of Leningrad who starved in a wholly different kind of warfare, there’s no doubt it’s tough to stomach.

One of the most interesting things about World War 1 is that many historians can’t seem to agree on why it was fought in the first place. What’s more is that if we don’t understand why the world went to war in 1914, it’s hard to tell how it ended and what the consequences are.