 Complete the following phrase:  During World War I, the Ottomans sided with Germany and the Central Powers. In the Mesopotamian campaign against the Central Powers, British forces invaded the country and initially suffered a major defeat at the hands of the Turkish army during the Siege of Kut 19151916. However, subsequent to this the British began to gain the upper hand, and were further aided by the support of local Arabs and Assyrians. In 1916, the British and French made a plan for the post-war division of Western Asia under the Sykes-Picot Agreement. British forces regrouped and 