Editing Leslie Groves (section)

==Dates of rank==
{|class="wikitable"
! Insignia !! Rank !! Component !! Date
|-
|align="center" |No insignia || Cadet || [[United States Military Academy]] || 15 June 1916<ref name="1948_Register">{{Cite book |date=1948 |title=Official Army and Air Force Register (Volume I: A to Q) |location=Washington, D.C. |publisher=U.S. Government Printing Office |url=https://archive.org/details/officialarmyregi1948unit/page/n5  }}</ref>
|-
|align="center" |[[File:US-O1_insignia.svg|12px]] || [[Second lieutenant (United States)|Second Lieutenant]] || [[Regular Army (United States)|Regular Army]] || 1 November 1918<ref name="1918_Insignia">{{Cite book |date=1918 |title=Distinguishing Marks of the Army-Navy |location=Chicago, IL |publisher=Chicago Daily News Company |url=https://freepages.rootsweb.com/~worldwarone/military/WWI/Uniforms/index.html#Table%20of%20Contents%20-%20WWI{{^|I added this link as it contains images of the physical newspaper printed and delivered in Chicago, IL.}} }}</ref>
|-
|align="center" |[[File:US-O2 insignia.svg|12px]] || [[First lieutenant#United States|First Lieutenant]] || Regular Army || 1 May 1919<ref name="1948_Register"/>
|-
|align="center" |[[File:US-O3 insignia.svg|35px]] || [[Captain (United States O-3)|Captain]] || Regular Army  || 20 October 1934<ref name="1948_Register"/>
|-
|align="center" |[[File:US-O4 insignia.svg|35px]] || [[Major (United States)|Major]] || Regular Army || 1 July 1940<ref name="1948_Register"/>
|-
|align="center" |[[File:US-O5 insignia.svg|30px]] || [[Lieutenant colonel (United States)|Lieutenant Colonel]] || Regular Army ||11 December 1942<ref name="Arlington National Cemetery"/>
|-
|align="center" |[[File:US-O6 insignia.svg|55px]] || [[Colonel (United States)|Colonel (temporary)]] || [[Army of the United States]] || 14 November 1940<ref name="Arlington National Cemetery">{{cite web |url=https://www.arlingtoncemetery.net/lggroves.htm |title=Leslie Richard Groves - Lieutenant General, United States Army |last=Patterson |first=Michael |date=July 4, 2023 |website=Arlington National Cemetery |access-date=6 July 2023}}</ref>
|-
|align="center" |[[File:US-O7 insignia.svg|35px]] || [[Brigadier general (United States)|Brigadier General (temporary)]] || Army of the United States || 6 September 1942<ref name="Arlington National Cemetery"/>
|-
|align="center" |[[File:US-O8 insignia.svg|70px]]  || [[Major general (United States)|Major General (temporary)]] || Army of the United States || 9 March 1944<ref name="1950_Register">{{Cite book |date=1950 |title=Official Army Register, Volume I (United States Army: Active and Retired Lists) |location=Washington, D.C. |publisher=U.S. Government Printing Office |url=https://archive.org/details/officialarmyregi1950unit/page/726 }}</ref>
|-
|align="center" |[[File:US-O7 insignia.svg|35px]] || Brigadier General || Regular Army || 6 December 1945<ref name="1948_Register"/>
|-
|align="center" |[[File:US-O9 insignia.svg|100px]]  || Lieutenant General (honorary) || Regular Army || 24 January 1948 (with effect from 16 July 1945, per Private Law 394-A of the 80th Congress)<ref name="1950_Register"/>
|-
|align="center" |[[File:US-O8 insignia.svg|70px]]  || Major General || Retired || 29 February 1948<ref name="1950_Register"/>
|-
|align="center" |[[File:US-O9 insignia.svg|100px]]  || Lieutenant General (honorary) || Retired || 29 February 1948<ref name="1950_Register"/>
|}