War of the Rebellion: Serial 126 Page 0497 UNION AUTHORITIES.

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Tennessee, under Major-General Stoneman. Adequate forces were reserved in the Department of Washington, under Major-General Augur, to protect the capital and the immense depots of military supplies at Washington and Alexandria, and also in the Middle Military Department, under Major General Lewis Wallace, to cover Baltimore and the important lines of supply and communication in that department. Besides the armies operating actively in the field, troops were assigned to garrison exposed and important strategic points, to guard hospitals, recruiting stations, prison camps, supply depots, railroad lines, and to defend border States and the northern frontier from rebel raids.

In the Department of the South a force was operating against Charleston and in Florida, under General Gillmore.

West of the Mississippi the forces were under the respective departmental commanders. In the Department of the Gulf, embracing Louisiana and Texas, Major-General Banks had his headquarters at New Orleans. The Department of Arkansas was in command of Major- General Steele. Major-General Curtis commanded the troops assigned for the Department of Kansas and the Indian Territory. The troops in the Department of the Missouri were under command of Major-General Rosecrans. The defense of the Northwestern States and Territories against Indians, expeditions to check incursions and reduce hostile tribes, and to protect the overland route to California employed a considerable force under Major- General Pope in the Northwest Department, General Carleton in New Mexico and Arizona, and General Connor in the Indian Territory. The States and Territories on the Pacific Coast required but a small force, under Major-General McDowell.

The headquarters of the lieutenant-general commanding all the armies were with the Army of the Potomac in the field.

Official reports show that on the 1st of May, 1864, the aggregate national military force of all arms, officers and men, was 970,710, to wit:

Available force present for duty*..................... 662,345

On detached service in the different military

departments........................................... 109,348

In field hospitals or unfit for duty.................. 41,266

In general hospitals or on sick-leave at home......... 75,978

Absent on furlough or as prisoners of war............. 66,290

Absent without leave.................................. 15,483

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Grand aggregate....................................... 970,710

The aggregate available force present for duty May 1, 1864, was distributed in the different commands as follows:

Department of Washington.............................. 42,124

Army of the Potomac................................... 120,384

Department of Virginia and North Carolina............ 59,130

Department of the South............................... 18,169

Department of the Gulf................................ 61,865

Department of the Arkansas............................ 23,666

Department of the Tennessee........................... 74,170

Department of the Missouri............................ 15,775

Department of the Northwest........................... 5,296

Department of Kansas.................................. 4,798

Headquarters Military Division of the Mississippi..... 476

Department of the Cumberland.......................... 119,948

Department of the Ohio................................ 35,416

Northern Department................................... 9,546

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*But see explanatory foot-note, p. 136.

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32 R R-SERIES III, VOL V