 It has been estimated that, of the state's 1860 population of 687,000, about 4,000 Marylanders traveled south to fight for the Confederacy.While the number of Marylanders in Confederate service is often reported as 20-25,000 based on an oral statement of General Cooper to General Trimble, other contemporary reports refute this number and offer more detailed estimates in the range of 3,500 (Livermore) to just under 4,700 (McKim), which latter number should be further reduced given that the 2nd Maryland Infantry raised in 1862 consisted largely of the same men who had served in the 1st Maryland, which mustered out after a year.While other men born in Maryland may have served in other Confederate formations, the same is true of units in the service of the United States.