Background
Mackenzie, Ranald Slidell was born on July 27, 1840 in Westchester County, New York, United States. Son of Alexander Slidell and Catherine (Robinson) Mackenzie.
Mackenzie, Ranald Slidell was born on July 27, 1840 in Westchester County, New York, United States. Son of Alexander Slidell and Catherine (Robinson) Mackenzie.
Graduated from the United States Military Academy, 1862.
Captain, commander; general United States Army. Major general United States Volunteers. General United States Volunteers, from 1865.
Served as First lieutenant corps engineers Army of Potomac, 1863, participated in Maryland. campaign, Rappahannock campaign (battles of Fredericksburg, Chancellorsville, 1863), Pennsylvania campaign (Battle of Gettysburg), Rapidan campaign, 1863-1864.