United States Colored Troops (USCT) were the embodiment of Frederick Douglass’s belief that “he who would be free must himself strike the blow." Approximately 180,000 men -- many who were former slaves -- volunteered to fight in the Union army; nearly 40,000 gave their lives for the cause. With every engagement they fought in, African-Americans time and again proved their mettle. At Port Hudson in Louisiana, Fort Wagner in South Carolina, Chaffin's Farm in Virginia, and elsewhere, USCT units displayed courage under fire and won glory on the field of battle. By the end of the war, African-Americans accounted for 10 percent of the Union army. The USCT were a watershed in American history, and one of the first major strides toward equal civil rights.