The Second Crusade (1145-49) was an ambitious and unprecedented attempt to expand the borders of Christianity in the Holy Land, the Baltic and the Iberian peninsula. Because the expedition to the Levant proved a spectacular failure, historians have largely ignored the impact of this important event. This wide-ranging collection offers a series of original interpretations of partially explored evidence for all three theatres of war. It also considers the planning, execution and consequences of the crusade for western Europe, the Crusader States of the Holy Land and the Muslim Near East. An international group of leading academics have produced a volume that marks a significant contribution to the study of European expansion and the history of the crusades. This work should be of use for researchers, students, scholars and teachers of medieval historians, both students and teaching scholars.