The River of Baghdad is a reference to the Tigris River, which is a 6-letter word. The Tigris River is one of the two major rivers that run through Iraq, the other being the Euphrates River. It is the second longest river in Western Asia, and it flows from the mountains of Turkey through Iraq and into the Persian Gulf. The Tigris River has been an important part of the region's history for centuries, providing water for irrigation and transportation.