"and pile them high at gettysburg
and pile them high at ypres and "
"grass." carl sandburg, 1918.

to what does sandburg allude in this passage?

a) industrial landmarks
b) famous battlefields
c) american cities
d) midwest farm areas

Sandburg alludes to B. famous battlefields in this passage.
The battle of Gettysburg happened during the American Civil War, the battle of Ypres occurred during WWI, as well as the battle of Verdun. He is referring to these famous battles and the fields where they happened because he wants to make a powerful impact on the reader/listener.