In the 19th century, when the Ottoman Empire restored direct rule over Yemen, the resulting turmoil came to threaten the security of the entire Arabian Peninsula. This book describes the various military campaigns to regain control over Yemen, surveying the increased foreign encroachments by the British in the south and the Italians through the Red Sea, and the revolts of the Zaidi Imams and Isma'ili tribes. Using previously unknown archival material, this history of political rivalries and challenges confronting Ottoman Yemen in the 19th century should prove useful for scholars and students.