Baghdad 's capture Conquering was a significant achievement Achieve given Giving its mastery of the Tigris and Euphrates rivers and their international and regional trade .

It represented , along with the fall Conquering of Basra in 1546 , a significant step towards eventual Ottoman victory Getting and the procurement Commerce_buy of the lower Mesopotamia , the mouths of the Euphrates and Tigris rivers , opening Openness a trading outlet into the Persian Gulf .

The purpose was to drive Control Al-Qaeda in Iraq forces from the Western Euphrates River Valley .

There were three goals of Operation Sayeed , in addition to removing AQI from the Western Euphrates River Valley ; they were to ensure Preventing_or_letting there was a secure `` climate '' and `` environment '' to conduct Action a referendum in October and national elections Choosing in December 2005 ; and the third was to secure the control of the Iraqi border to the Iraqi people .

After receiving Receiving the submission of Haran and Edessa , Hulagu Khan crossed Motion_directional the Euphrates , sacked Process_end Menbij and placed Placing Aleppo under siege Besieging .