To put the below in perspective, the number of Jewish men in the northern army was anywhere between 6,000 to 15,000. The Jewish contribution to the military effort of the Confederacy was significant, and Secretary of War John Seddon’s estimated that there were between 10,000 and 12,000 Jews fighting in grey.
American Jews in Grey
“At the time of the Civil War there were about 150,000 Jews in the United States among a white population of 27 million. Jews thus constituted slightly more than half of one percent of the total.
The intense loyalty of Southern Jews to the Confederacy was to be expected in view of the fact that the South was the first region in the United States to tear down the barriers blocking the political and social advance of Jews. Thus, the first Jew to serve as a State governor was David Emanuel, who, having distinguished himself for valor in the siege of Savannah in the Revolutionary War, was elected Governor of Georgia in 1801. In contrast, the last State to retain discriminatory laws against Jews holding public office was New Hampshire, which did not remove them until 1876.
The first Jew to be elected to the United States Senate was also a Southerner. David Levy Yulee was elected Florida’s first United States Senator in 1845. In Congress he was vociferous in his opposition to federal restrictions on the introduction of slavery into the territories to be acquired from Mexico.
The second Jew to serve in the Senate was Judah P. Benjamin, a man descended from Spanish Jews who were expelled from the peninsula, then ended to England, then to the American South. He left Yale without graduating, arrived in New Orleans with four dollars in his pocket, married into a distinguished Creole family, became an immensely successful lawyer and planter, and pioneered in the mechanization of sugar cultivation.
President Zachary Taylor nominated him for Attorney General; Millard Fillmore nominated him for Associate Justice of the Supreme Court.”
(The Jew in American Politics. Nathaiel Weyl. Arlington House. 1968, pp. 50-51)