The Fall of North China

CHAPTER 3 · 1209–1234 · The Mongol Empire, 1206–1294

For two millennia the walls held, more or less: nomads raided China, took their tribute, and left, because horsemen cannot climb ramparts. Watch this chapter break the pattern permanently. Genghis rehearses on Xi Xia, the Tangut kingdom of the Gansu corridor (the tan patch appearing on your map) — his first sieges are almost comic failures; an attempt to flood one capital drowns the Mongol camp instead. But the rehearsal teaches the lesson that wins the century: capture the specialists. Every fallen town yields engineers, carpenters, gunpowder-men — offered employment, not death — and by the t

The turn: Zhongdu, May 1215.

This chapter is one scene of an interactive atlas: the map repaints as the dates advance, campaigns draw themselves, and every chapter argues its causes and consequences — then a field exam asks you to prove it on the map.