This is the first book to survey the evolution of the strategic basing systems of the great powers, covering an 800-year span of history, from the Mongol dynasty to the era of the US empire. Robert E. Harkavy details the progression of strategic basing systems and power projection, from its beginnings at a regional level to its current global reach, while emphasizing the interplay between political and international systemic factors (bipolar vs. multipolar systems), and technological factors. Analyzing the relationship between basing structures and national power, the book deals with such key questions as: the co-mingling of military and commercial functions for bases; sea power; geopolitical theory; imperial ‘pick-off’ during hegemonic wars; base acquisitions; continuity between basing structures; and long-term shifts in basing functions.