| Birth | 8 Aug 1836 | Belleville, Essex County, New Jersey | | | |
| Residence | 1840 | [probably] with his parents - Bellville, Essex County, New Jersey | | | |
| Military | | served through the Mexican War | | | |
| Residence | 7 Sep 1850 | in Christopher Rutherford household who was a teacher - Hempstead, Queens County, New York | | | |
| Miscellaneous | 1856 | studied law and stenography - Potsdam, Saint Lawrence County, New York | | | |
| Miscellaneous | 1856 | studied law and stenography - Williamsburgh, Hampshire County, Massachusetts | | | |
| Miscellaneous | 1857 - 61 | studied law and literature - Boston, Suffolk County, Massachusetts | | | |
| Residence | 1860 | at 88 4th - Brooklyn, Kings County, New York | | | |
| Military | 27 Apr 1861 | enlisted - Postdam, Saint Lawrence County, New York | | | |
| Residence | 27 Apr 1861 | Williamsburgh, Kings County, New York | | | |
| Military | 30 Apr 1861 | was a Captain of Co. B, 16th N. Y. Vol. Inf. during the Civil War - Potsdam, Saint Lawrence County, New York | | | |
| Military | 15 May 1861 | enlisted & mustered in & was Captain of Company B, 16 NY Volunteer Mlitia - Albany, Albany County, New York | | | |
| Military | 6 Jul 1861 | resigned | | | |
| Military | 13 Sep 1861 | served as 2nd Major of the 9th Calvary Regiment out of Kansas - Kansas | | | |
| Military | 1861 | as Captain of 2d Kansas Volunteer Cavalary, employed on staff and special duty - Kansas | | | |
| Military | 1862 | served as Major in the 2nd Kansas Volunteer Cavalry Co F & S - Kansas | | | |
| Military | 25 Mar 1862 | Major Pomeroy was shot in the right thigh in the Battle of Little Sante Fe - Little Santa Fe, Missouri | | | |
| Military | Jul 1862 | | | | |
| Miscellaneous | 1862 | sold property either to his mother Esther (Morgarum) Pomeroy or his sister, Esther Pomeroy - Franklin County, New York | | | |
| Miscellaneous | 2 Jul 1862 | was deeded land by quit claim which he then deeded to his mother - Malone, Franklin County, New York | | | |
| Military | Aft 18 Jul 1862 | Major Pomeroy led 9th Regisment of Connecticut, battalion into a charge | | | |
| Military | 12 Aug 1862 | Boston, Suffolk County, Massachusetts | | | |
| Military | 1863 - 65 | in the armies of the frontier and - Arkansas | | | |
| Military | Dec 1863 | | | | |
| Military | Dec 1863 | Major in the 9th Kansas Volunteers Cavalry | | | |
| Military | 20 Jul 1864 | Brownsville, Cameron County, Texas | | | |
| Military | 1865 | as a Colonel, then Lieutenant Colonel in the US Veteran Volunteers (Hancock's 1st Army Corp) | | | |
| Military | 20 Oct 1865 | accepted appointment as Brevet-Colonel in the 4th US Veterans Volunteers - Louisville, Jefferson County, Kentucky | | | |
| Residence | 20 Oct 1865 | gave his permanent resident as - Kansas | | | |
| Occupation | 1866 | lawyer - Baltimore, Baltimore County, Maryland | | | |
| Military | 28 Apr 1866 | Columbus, Franklin County, Ohio | | | |
| Military | 23 Jun 1866 | Williamsburgh, Kings County, New York | | | |
| Marriage | 23 Aug 1866 | Kansas City, Jackson County, Missouri - Anna Cheever CARTER | | | |
| Marriage | 23 Aug 1866 | Kansas City, Jackson County, Missouri - Anna Cheever CARTER | | | |
| Residence | 23 Aug 1866 | New York | | | |
| Military | 8 Apr 1867 | filed for a pension for his service in the Civil War as Capt. of Co. B 16 Regiment, NY Infantry | | | |
| Occupation | 1868 - 1887 | lawyer - Little Rock, Pulaski County, Arkansas | | | |
| Miscellaneous | 24 Jul 1868 | and "Jack" arrived by train - Little Rock, Pulaski County, Arkansas | | | |
| Miscellaneous | 24 Jul 1868 | and "Jack" arrived by train - Little Rock, Pulaski County, Arkansas | | | |
| Occupation | 15 Jun 1870 | lawyer - Little Rock, Pulaski County, Arkansas | | | |
| Military | 1874 | in the "Brooks & Baxter War" for control of the Arkansas State governmen - Arkansas | | | |
| Military | 1874 | Colonel of the Arkansas State Guards, an aid to Governor Baxter and then Brigadier General - Arkansas | | | |
| Military | 1874 | as Chief of Staff to Major-General Newton and later as Commander of State forces - Arkansas | | | |
| Occupation | 1875 | Inspector General on the staff of Governor Garland - Arkansas | | | |
| Occupation | 1877 - 79 | Adjutant-General - Arkansas | | | |
| Occupation | 1877 - 79 | Adjutant-General - Arkansas | | | |
| Miscellaneous | 24 Aug 1878 | as Adjutant General informed the public of the unlawful forming of political campagin clubs - Phillips County, Arkanasa | | | |
| Residence | 1881 | Little Rock, Pulaski County, Arkansas | | | |
| Residence | Bef 27 Nov 1887 | at 2354 Chestnut and was a lawyer - Saint Louis, Saint Louis City, Missouri | | | |
| Death | 27 Nov 1887 | Saint Louis, Saint Louis County, Missouri | | | |
| Burial | Aft 27 Nov 1887 | Jefferson Barracks National Cemetery, Saint Louis, Saint Louis City, Missouri | | | |