William F. Fox, Lt. Col. U. S. V., Regimental Losses in the American Civil War, 1861-1865: A Treatise on the extent and nature of the mortuary losses in the Union regiments, with full and exhaustive statistics compiled from the official records on file in the state military bureaus and at Washington

The most of those killed in the 73d fell in the assault on Port Hudson; and the killed in the 2d Infantry, at Natural Bridge, Va. Eleven officers of the latter regiment, including the Colonel and Chaplain, died of disease at Key West, Fla., in the summer of 1864.

There is no satisfactory explanation for the surprising mortality in the 5th Colored Heavy Artillery, and 65th Colored Infantry. The former regiment was recruited in Louisiana and Mississippi, and was stationed along the Mississippi river at various points between Memphis and Port Hudson. The most of the deaths were caused by fevers; and at one time the regiment suffered from small pox. It was organized at Vicksburg in August, 1863, and was mustered out May 20, 1866. Its original designation was the 9th Louisiana Vols., A. D.

The 65th Colored Infantry was also stationed along the Mississippi. It was recruited in Missouri, and organized at Benton Barracks, Mo., in December, 1863, as the 2nd Missouri Vols., A. D. Over 100 men died at the Barracks before the regiment took the field, the men having been enlisted by the Provost-Marshals throughout the State and forwarded to this Post during an inclement season,--thinly clad, and many of them hatless, shoeless, and without food. Many suffered amputation of frozen feet or hands, and the diseases engendered by this exposure resulted in a terrible and unprecedented mortality.

Miscellaneous Regiments.--In addition to the lists in the preceding pages, there were several regiments from the Territories and Southern States. The deaths in these commands are embraced in the losses credited their respective States and Territories, in the table given in the succeeding chapter. Some of these regiments suffered severely in action; notably, the ist Colorado, which lost 32 killed and 76 wounded at Apache Cañon; the 1st Louisiana (white), which lost 123 killed and wounded at Port Hudson; and the ist Arkansas Cavalry, which lost over 100 men killed in the guerrilla fighting on the Arkansas Frontier.

The remarkably large number of deaths from disease in some regiments includes the deaths in Confederate prisons, in which case the latter should be deducted in order to prevent an erroneous impression regarding the death rate of the regiment.

The following named regiments sustained unusually heavy losses by deaths in Confederate prisons: