Hello and welcome back. This is WAR 1870–1949: How Empires Rise and Fall. Last time we built the alliance machine—how fear becomes commitment, how commitment becomes credibility, and how credibility becomes a trap. Today we move to the place where that machine is most likely to seize and throw sparks.

The Balkans.

I want you to picture the Balkans not as a simple region on a map, but as a fault line. A seam in the world. A place where empires overlap, where identities tangle, where languages and religions and memories live on top of each other like layers of sediment. The Balkans are where the old imperial order—especially the Ottoman Empire and the Austro-Hungarian Empire—begins to crack under the pressure of modern nationalism. And when old orders crack, the scramble to inherit their territory becomes both political and deeply emotional.