 Complete the following phrase:  From the very start of World War I, Iran declared neutrality. When the war erupted on a full scale, Tabriz and much of northwestern-northern Iran had already been de facto occupied by Russia for several years. In later years of World War I, the Ottoman troops intervened and took control of the city by defeating the Russian troops stationed there. By this time, the Ottoman army led by Enver Pasha threatened the whole Russian army in the Caucasus region. Russian troops recaptured the city from the Ottomans at a later stage of the war. By escalation of the 