Timur then began a five-year campaign to the west in 1392, attacking Persian Kurdistan. In 1393, Shiraz was captured after surrendering, and the Muzaffarids became vassals of Timur, though prince Shah Mansur rebelled but was defeated, and the Muzafarids were annexed. Shortly after Georgia was devastated so that the Golden Horde could not use it to threaten northern Iran. In the same Year, Timur caught Baghdad by surprise in August by marching there in only eight days from Shiraz. Sultan Ahmad Jalayir fled to Syria, where the Mamluk Sultan Barquq protected him and killed Timur's envoys. Timur left the Sarbadar prince Khwaja Mas'ud to govern Baghdad, but he was driven out when Ahmad Jalayir returned. Ahmad was unpopular but got some dangerous help from Qara Yusuf of the Kara Koyunlu; he fled again in 1399, this time to the Ottomans.