The Empire of Habsburg Austria faced more enemies than any other European great power. Flanked on four sides by rivals, it possessed few of the advantages that explain successful empires. Its army was not renowned for offensive prowess, its finances were often shaky, and its populace was fragmented into more than a dozen ethnicities. Yet somehow Austria endured, outlasting Ottoman sieges, Frederick the Great, and Napoleon. The Grand Strategy of the Habsburg Empire tells the story of how this cash-strapped, polyglot empire survived for centuries in Europe’s most dangerous neighborhood without succumbing to the pressures of multisided warfare.