Alfred Thayer Mahan
Alfred Thayer Mahan was a United States naval officer and historian, whom John Keegan called "the most important American strategist of the nineteenth century." His book The Influence of Sea Power Upon History, 1660–1783 (1890) won immediate recognition, especially in Europe, and with its successor, The Influence of Sea Power Upon the French Revolution and Empire, 1793–1812 (1892), made him world-famous.
27 September 1840
Born on the same birth date (27 September 1840): Thomas Nast
Born on the same birth day (27 September): Antoine Philippe de La Trémoille • Christian Wood • Claudio Gentile • Guillaume Rondelet • Ioana Mincă • Jason Phillips (catcher) • Jon Garland • Lakshmipathy Balaji • Lil Wayne • Lisa Ryzih • Markus Rosenberg • Oliver E. Williamson • Paul Bevan • Paul Reichmann • Sam Ervin • Sam Lerner • Sammy Benskin • Samuel Francis Du Pont • Shaun Cassidy • Steve Archibald
Born in the same month (September 1840): Jacob Christian Fabricius • Louis-Olivier Taillon • Murad V • Thomas Nast