The Cursed Dnieper
The earliest terrorist act with the intention to flood a city goes back to the Mongol conqueror Genghis Khan. In 1209, in order to put a quicker end to the siege on Yinchuan, the capital of the Western Xia dynasty (now in north-west China), Genghis Khan set out with his troops to divert a branch of the Huang He, the Yellow River. The makeshift dam broke and the ploy backfired. It was Genghis Khan’s camp that was flooded.