Up to 500,000 Union soldiers, or one fourth of the Union army, had been born in Europe. These immigrants had left their home countries for a multitude of reasons, mostly economic and political. In the United States, they envisioned a country of freedom that would allow them to pursue their goals of acquiring wealth and participating in politics. Soon immersed in the great debate over the expansion of slavery, many immigrants found themselves forced to take sides and eventually rallied around the Union flag. Ethnic Americans joined the northern army out of the same motivations as their...