Except for the machine guns, not much different than Lee’s assault on Cemetery Ridge at Gettysburg, or Grant’s assault at Cold Harbor. Thousands of soldiers lives thrown away for zero results.
The American Civil War was our first encounter with industrialized warfare on a massive scale; for much of Europe, that came in WWI. The earlier wars (Franco-Prussian, Austro-Prussian) were settled too quickly for them to understand how warfare had changed.
The trench mutinies of 1917, which were hidden from the Western public at the time, came about when French troops realized their lives were being thrown away needlessly by elderly generals with no concept of how warfare had changed. Two decades later, the offspring of those French troops refused to be conned again; Germany took France in weeks because a new set of aging French generals were prepared to go to war “1914-style”.