George Livingston, Jr. served in the American Revolution: He enlisted in Frederick Co., VA in between January to May of 1778, and was discharged the following July or August according to the data entered by his son James S. Livingston's daughter Elizabeth Ann Livingston's daughter Emma A. Norris on Emma's application to the Daughters of the American Revolution for membership. Emma's DAR application, based upon her Great Grandfather George Livingston, Jr.'s Revolutionary War service, was received at the DAR on November 7, 1921, and approved on February 8, 1922, and accepted by the DAR's National Board also on February 8, 1922. Based upon the documentation submitted with Emma's application, the DAR accepted George Livingston, Jr. as a Patriot/Soldier of the American Revolution, and accepted his Great Grandaughter Emma as a member, assigning her the six digit National Number: 176154 . Emma's DAR application referred to the 1907 Doctoral thesis of John Walter Wayland, B.A., Ph.D., at the University of Virginia in Charlottesville, VA. In this Thesis titled 'The German Element of the Shenandoah Valley of Virginia', in Chapter IX 'Politics and War', on page 145 contains a Pay Roll (Listing) of the members of Captain Joseph Bowman's Company of Frederick Co. VA, in General George Rogers Clark's Army. It is stated by Dr. Wayland on page 145, that the members of Captain Bowman's Company on this Roll enlisted from January to May of 1778, and were discharged the following July to August after the taking of Kaskaskia. On the Pay Roll listing of Captain Bowman's Company appears the name 'Geo. Livistone'. See: 'The German Element of the Shenandoah Valley of Virginia', written and published, and copyright 1907 by John Walter Wayland, printed 1907 by the Miche Company, Printers, Charlottesville, VA, Pages 143-145.

George Livingston, Jr. took the Oath of Allegance in Worcester Co., MD in 1778 before the Honerable (Judge) Nehemia Holland. See Manuscript MS-1814, Box 4, (Revolutionary War Military Collection Manuscript), at the Manuscript Division of hte Maryland Historical Society at No. 201 West Monument Street, Baltimore City, MD. See Also: Henry C. Peden, Jr., 'Revolutionary Patriots of Worcester & Somerset Counties, Maryland 1775 - 1783', published 1999 by Willow Bend Books & Family Line Publications, Westminister, Caroll Co., MD, Pages iv, 180.

George Livingston, Jr.also served as a Private in the MD Militia in the American Revolution as Rank 7'th Class under his Mother's Cousin Captain Samuel Horsey in Captain Horsey's Company in the Wicomico Battalion in Worcester Co., MD. This is recorded in an July 15, 1780 record of the Wicomico Battalion. His brothers Todd and Stephen Horsey Livingston, as well as his future Father-in-Law Zadock Ennis, Sr. (4'th Class) also served within this same Company in the American Revolution. So did Jesse Fooks who was brother of the mother of George Jr.'s future wife. Other names of interest to Livingstons in Captain Samuel Horsey's Company were:
Isaac Dixon; William & Thomas Fooks, James & Charles Roach (4th Class); and Samuel Horsey (7th Class). See S. Eugene Clements and E. Edward Wright, 'The Maryland Militia in the Revolutionary War' Appendix B - Muster Rolls and Other Lists, pages 256-257.

In the years following George Livingston, Jr.'s death, two of his Son James S. Livingston's descendants submitted applications for membership to the DAR (Daughters of the American Revolution) headquarters in Washington, DC. Both applicants basing their membership claims upon their ancestor George Livingston, Jr.'s service to the State of Maryland as a Patriot to or soldier of the American Revolution. Based upon the documentation submitted with these applications, the DAR accepted George Livingston, Jr. as a patriot/Soldier of the American Revolution. Based upon their submitted descendancy documentation, the DAR then accepted both applicants as members, assigning each a unique 6 digit National Number. These numbers were: 176154 -- for James S. Livingston's daughter Elizabeth Ann Livingston's daughter Emma A. Norris. 271367 -- for Emma (Doniphan) Keene, who was daughter of Edwin C. Doniphan, who was son of Edwin Dorsey Doniphan & wife Mary Jane Livingston, who was the other daughter of James S. Livingston.