Some of those men were black, the new units going forward along with the white troops who have been in the field for years. The Negro soldiers charged straight at the U.S. trenches; they weren’t skilled in the fire-and-move tactics the veterans had learned by painful experience. And they went down in gruesome numbers. When they screamed, Bartlett couldn’t tell their voices from those of white men.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "Some of those men were black, the new units going forward along with the white troops who have been in the field for years. The Negro soldiers charged straight at the U.S. trenches; they weren’t skilled in the fire-and-move tactics the veterans had learned by painful experience. And they went down in gruesome numbers. When they screamed, Bartlett couldn’t tell their voices from those of white men." in the context of "Chapter 9 (p. 214)" to mean that wisdom is timeless.