When the USA entered World War I in April 1917 her Regular Army counted just 128,000 men and lacked all the necessary equipment and training for modern trench warfare. By the Armistice of November 1918, General John J.Pershing's American Expeditionary Force in France had more than 2 million men and was holding 25 per cent of the Western Front. They had helped smash Ludendorff's brilliant Operation "Michael" in the lines before Paris; had turned onto the offensive themselves at St Mihiel and the Meuse-Argonne; and if Germany had not negotiated peace with unexpected speed the US Army would have taken over from their tired Allies an even greater share of the planned 1919 campaign. This concise account of America's first world class army, its organization, uniforms, weapons and character, is illustrated with rare photos and eight full color plates.

Mark R. Henry is a lifelong student of military history and an experienced re-enactor of many periods. He served in the US Army as a signals officer 1981-90, in Germany, Texas and Korea. He holds a BA degree in History and is studying for his Master's; and currently works in the US Army museum system. His special interest lies in the United States armed forces of the 20th century.

Stephen Walsh studied art at the North East Wales Institute. Since then he has worked mainly for the American historical board-game market, fulfilling a lifelong interest in historical subjects. His American works include the best-selling Settlers of Catan. He has also produced many pieces of artwork inspired by J R R Tolkien. He is married with two children and lives in Macclesfield.