Dan Carlin's Hardcore History podcast, 99 years after the downfall of Napoeleon at Waterloo. A series of 6 podcasts focusing on the time leading up to WWI, the entirety of the "The War to end all Wars" and its aftermath. Highly recommended, so absorbing and mesmerizing in its narrative. You do not have to be a history buff to really get into this. Warning: once you begin, you will not stop listening until you finish.