Americans had just fought the first modern war, your civil war, so would have a better grip on how to fight machine gun nests.
You do know that all or at least most of the European powers had observers on hand on both sides during the American Civil war and yet seem not to had learn a great deal from it.
The Military Legacy of theCivil War
The European Inheritance
New Introduction by the author
xxx, 254 pages, illus.
Modern War Studies
Paper ISBN 978-0-7006-0379-4 $14.95
This pioneering study focuses on the experiences and writings of the surprisingly large number of Prussian, British, and French military observers who witnessed the Civil War firsthand. Luvaas's fascinating account reveals why they came, what they wrote, what their armies learned (or failed to learn) from their reports, and how their writings influenced later European military theorists.
For this edition, Luvaas has added a thoughtful introduction that analyzes why some "military lessons" are learned and others ignored and examines the extent to which such lessons can be applied to subsequent conflicts.
"Far and away the best investigation and analysis of the impact of the American Civil War on European military thought and military history."--Russell F. Weigley, author of The American Way of War
"A wonderfully original work."--Stephen B. Oates, author of Abraham Lincoln
"Luvaas shows in general how military ideas are transmitted or lost within professional circles. This contribution is one of the few important pieces on the intellectual history of war."--Alex Roland, author of Underwater Warfare in the Age of Sail
"Practically in a class by itself among the more than 70,000 volumes published on the Civil War period."--James I. Robertson, Jr., author of General A. P. Hill: The Story of a Confederate Warrior
JAY LUVAAS is professor of military history at the United States Army War College at Carlisle Barracks, Pennsylvania, and is the author or editor of numerous books, including The Education of an Army: British Military Thought, 1815-1940.