The U.S. Army has always regarded preparing for war as its peacetime role, but how it fulfilled that duty has changed dramatically over time. J. P. Clark traces the evolution of the Army between the War of 1812 and World War I, showing how differing personal experiences of war and peace among successive generations of professional soldiers left their mark upon the Army and its ways.

Nineteenth-century officers believed that generalship and battlefield command were more a matter of innate ability than anything institutions could teach. They saw no benefit in conceptual preparation beyond mastering technical skills like engineering and gunnery. Thus, preparations for war were largely confined to maintaining equipment and fortifications and instilling discipline in the enlisted ranks through parade ground drill. By World War I, however, Progressive Era concepts of professionalism had infiltrated the Army. Younger officers took for granted that war’s complexity required them to be trained to think and act alike—a notion that would have offended earlier generations. Preparing for War concludes by demonstrating how these new notions set the conditions for many of the successes—and some of the failures—of General Pershing’s American Expeditionary Forces.

Prizes

Short-listed for AHF Distinguished Book Award 2018,Nominated for Distinguished Book Award - Military History 2017,Nominated for New-York Historical Society American History Book Prize 2016

Magnificent…Clark shows us how history ought to be written—not only illuminating the past but providing a useful way to think about the future…The implication of Preparing for War is that although the Army—or any organization—can learn from past generational conflicts, there are limits to what it can do about those of the future. -- Mackubin Thomas Owens * National Review *
The alternating and overlapping tumult of innovation and inertia, centralization and dispersion is the fascinating story of Clark’s volume, one that documents the century-long shift from the concept of the innate warrior to that of the trained careerist. Clark is acutely aware of the very real difference between practical and theoretical skills in conflict, and that soldiers with expertise in one domain are often incompetent in the other…Conflict, of course, is the only final exam that matters. In the meantime, military organization and preparation remain intrinsically difficult, put to the test only on wildly disparate, sporadic occasions. It’s a problem the Army grappled with well into its formative years, one whose origins Clark cogently illuminates. -- Anthony Paletta * HistoryNet *
Clark adds to our understanding by focusing specifically on the evolving debates over how the Army should prepare for war…Clark delivers a solidly researched, carefully argued, and strongly written study that weaves a masterful synthesis of a hundred years of institutional and intellectual history…This is an important book, one filled with insights valuable for our own day. -- Mike Morris * The Strategy Bridge *
Preparing for War is a subtle, sophisticated, and immensely insightful contribution to U.S. military history. Combining intimate understanding with admirable critical distance, J. P. Clark's study stands alone in describing the intellectual evolution of the army officer corps. His story may end with World War I, but its implications echo down to the present day. -- Andrew J. Bacevich, author of America's War for the Greater Middle East: A Military History
A unique and masterful combination of institutional, social, and intellectual history, and group biography, Preparing for War deserves a wide readership. How the army of the nineteenth century prepared for armed conflict sheds light and deep understanding on military readiness today and in the future. -- Lieutenant General (U.S. Army) H. R. McMaster, author of Dereliction of Duty: Lyndon Johnson, Robert McNamara, The Joint Chiefs of Staff, and the Lies that Led to Vietnam
Clark provides an excellent introduction to the political context within which America's army grew from a frontier constabulary force to one of the most powerful instruments in the world. His book will prove enlightening not only for students of the past but for those interested in how our army functions within the American political system today. -- Michael S. Neiberg, author of Potsdam: The End of World War II and the Remaking of Europe

A former member of the history faculty at West Point, J. P. Clark is an active duty army officer who has served as a strategic advisor to senior civilian and military officials in the Pentagon and British Ministry of Defence.