By the beginning of the Civil War, Massachusetts Senator Henry Wilson had established himself as one of the leaders of the Republican party. Together with Abraham Lincoln and Henry B. Stanton, Wilson ranks as one of the three most important civilian figures that contributed to creating and sustaining the military. As Chairman of the Senate Military Affairs Committee, he introduced and succeeded in passing most of the necessary legislation to obtain and to support an army, including the Enrollment Act of 1863. Wilson, more than any other politician was responsible for influencing the...