The mid-twentieth century has added new dimensions to the roles and missions long performed by the United States Army. In many lands whose peoples speak alien tongues and observe strange customs, the American soldier is now living and working as ally, friend, and counselor. As a representative of the American way of life, as a persuasive advocate of his country's modern equipment and tactical doctrine, as partner in a global system of achieving security for the entire free world, he is called upon to demonstrate a variety of talents---patience, tact, linguistic ability, and superior professional knowledge, among others. In all that he does, he must make a supreme effort to understand people and traditions often vastly different from his own. One of the pioneers in this new type of Army endeavor was the Military Advisory Group to the Republic of Korea, commonly known as KMAG. The men and officers who served in KMAG during the early days came to know all the frustrations and triumphs, the problems and partial solutions, the failures and successes that characterize new ventures. Major Sawyer and Mr. Hermes have vividly recaptured the spirit and actions of the men of both nations whose joint efforts established a remarkable record of achievement. Though this volume describes the Army's experience in Korea only, the lessons it contains have great value to an officer assigned to advisory group duty in any nation. The book will also introduce the general public to the manner in which the United States soldier can and does meet the ever-changing tasks demanded of him by his countrymen. A professional soldier and a professional military historian pooled their talents to prepare this work. Major Saver, presently attending the Command and General Staff College at Fort Leavenworth, Kansas, wrote his manuscript while on duty with the Office of the Chief of Military History from 1951 to 1955. A combat veteran of both World War II and the Korean War, he received a battlefield commission in France in 1945 and fought in Korea in 1950 with the 25th Infantry Division. He holds the Silver Star, the Bronze Star Medal, and the Purple Heart. Mr. Hermes, also a World War II veteran, is a graduate of Boston University, where he received an M.A. degree in 1942, and is currently completing requirements for a Ph.D. degree in history at Georgetown University. A staff member of the Office of the Chief of Military History since 1949, he is the author of Truce Tent and Fighting Front, a forthcoming volume in the series UNITED STATES ARMY IN THE KOREAN WAR. William H. Harris Brigadier General, U.S.A. Chief of Military History