Maj. Gen. Harold Greene isn’t the first fatality: A history of U.S. generals killed in combat

The US Civil War saw many General Officers killed in combat SFC Joe S. Davis Jr., MSM, DSL.
Union Generals Killed In The Civil War
The following list provides the names of the Union general officers killed in the American Civil War, plus the date, and the battle in which they received the wounds, and is organized by date. The list is in two sections; (1) Those killed in action and (2) those who later died as a result of wounds received in action.
Killed in Action--(38).
Brig.-General Thomas Williams, killed Aug. 5, 1862, at Battle of Baton Rouge, La.
Brig -General Robert L. McCook, killed Aug. 6, 1862, near Dechard, Tenn., by guerillas.
Brig.-General Henry Bohlen, killed Aug. 22, 1862, at Freeman's Ford, Rappahannock River, Va.
Major-General Philip Kearney, killed Sept. 1, 1862, at Chantilly, Va.
Major-General Isaac I. Stevens, killed Sept. 1, 1862, at Chantilly, Va.
Brig.-General Pleasant A. Hackelman, killed Oct. 3, 1862, at Corinth, Miss.
Brig.-General James S. Jackson, killed Oct. 8, 1862, at Perryville, Ky.
Brig.-General Wm. R. Terrill, killed Oct. 8, 1862, at Perryville, Ky.
Brig.-General Conrad Feger Jackson, killed Dec. 13, 1862, at Fredericksburg, Va.
Brig.-General Joshua W. Sill, killed Dec. 31, 1862, at Stone River, Tenn.
Major-General Hiram G. Berry, killed May 2, 1863, at Chancellorsville, Va.
Major-General John F. Reynolds, killed July 1. 1863, at Gettysburg, Pa.
Brig.-General Stephen W. Weed, killed July 2, 1863, at Gettysburg, Pa.
Brevet Major-General S. K. Zook, killed July 2, 1863, at Gettysburg, Pa.
Brevet Brig.-General A. Van Horn Ellis, Colonel 124th N. Y. Volunteers, killed July 2, 1863, at Gettysburg, Pa.
Brevet Brig.-General Lewis Benedict, Colonel 162d N. Y. Volunteers, killed April 9, 1864, at Port Hudson, La.
Brevet Major-General Alex. Hays, U. S. Volunteers, killed May 5, 1864, at the Wilderness, Va.
Brevet Major-General James S. Wadsworth, U. S. Volunteers, killed May 6, 1864, at the Wilderness, Va.
Major-General John Sedgwick, U. S. Volunteers, killed May 9, 1864, at Spottsylvania Court-house, Va.
Brig.-General Thomas G. Stevenson, U. S. Volunteers, killed May 10, 1864, at Spottsylvania Court-house, Va.
Brig.-General James C. Rice, U. S. Volunteers, killed May 10, 1864, at Laurel Hill, Va.
Brevet Brig.-General Henry H. Giesy, Major 46th Ohio Volunteers, killed May 28, 1864, at Dallas, Ga.
Brevet Brig.-General John McConihe, Colonel 169th N. Y. Volunteers, killed June l, 1864, at Cold Harbor, Va.
Brevet Brig.-General Thomas W. Humphrey, Colonel 95th Illinois Volunteers, killed June 10, 1864, at Grentown, Mo.
Brevet Brig.-General Wm. Blaisdell, Colonel 11th Massachusetts Volunteers, killed June 23, 1864, before Petersburg, Va.
Brevet Brig.-General George A. Cobham, Jr., Colonel 111th Pennsylvania Volunteers, killed July 20, 1864, at Peach-tree Creek, Ga.
Major-General James B. McPherson, U. S. Volunteers, killed July 22, 1864, before Atlanta, Ga.
Brevet Brig.-General Griffin A. Stedman, Colonel 11th Connecticut Volunteers, killed Aug. 6, 1864.
Brevet Brig.-General George E. Elstner, Lt.-Colonel 50th Ohio Volunteers, killed Aug. 8, 1864, before Atlanta, Ga.
Brevet Major-General David A. Russell, U. S. Volunteers, killed Sept. 19, 1864, at Winchester, Va.
Brevet Brig.-General Frank H. Peck, Lt.-Colonel 12th Connecticut Volunteers, killed Sept. 19, 1864, at Winchester, Va.
Brig.-General Hiram Burnham, U. S. Volunteers, killed Sept. 30, 1864, at Chopin's Farm, Va.
Brevet Brig.-General George D. Wells, Colonel 34th Massachusetts Volunteers, killed Oct. 13, 1864, at Cedar Creek, Va.
Brig.-General Daniel D. Bidwell, U. S. Volunteers, killed Oct. 19, 1864, at Cedar Creek, Va.
Brevet Brig.-General Sylvester G. Hill, Colonel 35th Iowa Volunteers, killed Dec. 15, 1864, at Nashville, Tenn.
Brevet Major-General Frederick Winthrop, Colonel 5th New York Veteran Volunteers, killed April 1, 1865, at Five Forks, Va.
Brevet Brig.-General George W. Gowan, Colonel 48th Pennsylvania Volunteers, killed April 2, 1865, near Petersburg, Va.
Brevet Brig.-General Theodore Read, Major and Asst. Adjutant-General Volunteers, killed April 6, 1865, at High Bridge, Va.
Died of Wounds Received in Action--(29).
Brig.-General Wm. H. L. Wallace, U. S. Volunteers, died April 10, 1862, at Savannah, Tenn., of wounds received at Shiloh, Tenn.
Brig.-General George W. Taylor, U. S. Volunteers, died Aug. 31, 1862, at Alexandria, Va., of wounds received near Cub Run, Va.
Brevet Brig.-General Thornton F. Broadhead, Colonel 1st Michigan Cavalry, died Sept. 2, 1862, of wounds received at Bull Run, Va.
Major-General Jesse L. Reno, U. S. Volunteers, died Sept. 14, 1862, of wounds received in battle of South Mountain, Md.
Major-General Joseph K. F. Mansfield, U. S. Volunteers, died Sept. 18, 1862, of wounds received in battle of Antietam, Md.
Brig.-General Isaac P. Rodman, U. S. Volunteers, died Sept. 30, 1862, of wounds received in battle of Antietam, Md.
Major-General Israel B. Richardson, U. S. Volunteers, died Nov. 3, 1862, at Sharpsburg, Md., of wounds received in battle of Antietam, Md.
Brig.-General George D. Bayard, U. S. Volunteers, died Dec. 14, 1862, of wounds received at the battle of Fredericksburg, Va.
Major-General Amiel W, Whipple, U. S. Volunteers, died May 7, 1563, at Washington, D.C., of wounds received at Chancellorsville, Md.
Brig.-General Edmund Kirby, U. S. Volunteers, died May 28, 1863, at Washington, D. C., of wounds received at Chancellorsville, Md.
Brevet Brig.-General George H. Ward, Colonel 15th Massachusetts Volunteers, died July 2, 1863, of wounds received at Gettysburg, Pa.
Brevet Brig.-General Paul Joseph Revere, Colonel 20th Massachusetts Volunteers, died July 5, 1863, of wounds received at Gettysburg, Pa.
Brevet Brig.-General Louis R. Francine, Colonel 7th New Jersey Volunteers, died July 16, 1863, of wounds received at Gettysburg, Pa.
Major-General George C. Strong, U. S. Volunteers, died July 30, 1863, of wounds received in the assault on Fort Wagner, S. C.
Brig.-General Wm. H. Lytle, U. S. Volunteers, died Sept. 20, 1863, of wounds received at Chickamauga, Ga.
Brig.-General William P. Sanders, U. S. Volunteers, died Nov. 19, 1863, of wounds received before Knoxville, Tenn.
Brevet Brig.-General Wm. N. Green, Lt.-Colonel 173d New York Volunteers, died May 14, 1864, of wounds received in action.
Brevet Brig.-General Arthur H. Dutton, Colonel 21st Connecticut Volunteers, died June 4, 1864, of wounds received in action.
Brevet Brig.-General Wm. H. Sackett, Colonel 9th New York Cavalry Volunteers, died June 10, 1864, of wounds received in action.
Brevet Brig.-General George L. Presscott, Colonel 32d Massachusetts Volunteers, died June 19, 1864, of wounds received in action.
Brig.-General Charles G. Harker, U. S. Volunteers, died June 27, 1864, of wounds received before Marietta, Ga.
Brig.-General Samuel A. Rice, U. S. Volunteers, died July 6, 1864, of wounds received at Jenkins' Ferry, Ark.
Brevet Brig.-General James A. Mulligan, Colonel 23d Illinois Volunteers, died July 26, 1864, of wounds received at Winchester, Va.
Brevet Brig.-General Henry Lyman Patten, Major 20th Massachusetts Volunteers, died September 10, 1864, of wounds received in action.
Brevet Brig.-General Willoughby Babcock, Lieut.-Colonel 75th New York Volunteers, died October 6, 1864, of wounds received in action.
Brevet Brig.-General Alexander Gardiner, Colonel 14th New Hampshire Volunteers, died October 7, 1864, of wounds received at Opequan, Va.
Brevet Brig.-General J. Howard Kitching, Colonel 6th New York Volunteer Artillery, died Jan. 10, 1865, of wounds received in action.
Brevet Major-General Thomas A. Smyth, U. S. Volunteers, died April 9, 1865, of wounds received near Farmville, Va.
Brevet Brig.-General Francis Washburn, Colonel 4th Massachusetts Cavalry, died April 22, 1865, of wounds received in action.
There were a lot of Confederate Generals killed as well.
https://en.wikipedia.org/wiki/List_of_American_Civil_War_generals_(Confederate)

General Therode Roosevelt Jr, Ohana Beach, 1944. Frail, ill health and wanted to be there on D Day. Some Soldiers want to serve and share!