- June 1786 - Enlists as a private in the Queen's Dragoons - Height 68" - age 24
- June 1791- Promoted to Corporal
- September 1792- Enlists in "Black Legion" - Made Lt. Colonel
- July 1793 - Colonel - given command of the "Black" Legion
- September 1793- General in Command of a Division
- December 1793 Given Command of the "Army of the Alps
Record as General
- January 1794 - Leaves Paris to take Command
- April 1794 - First major attack by the Army ( Battle of Mount Cenis) fails
- May 1794 - Personally leading the attack, Dumas secures Mount Cenis.
- June 1794 - Dumas ordered to Paris for questioning by the "Committee for Public Safety"
- August 1794 - Dumas takes command of the "Army of the West" (26 thousand men) involved in 'pacifying' Vendee.
- November 1794- Dumas relieved of Command at his request
- December 1794 - Dumas is granted medical leave
- January 1796 - Dumas asks to resign from the Army due to 'Poor Health'
- June 1796 - Health recovers
- August 1796 - Assigned Divisional Commander in "Army of the Alps'
- September 1796- Writes insubordinate letters to Paris criticizing his Commanding Officer
- October 1796- Commanding Officer transfers him to Napoleon's "Army of Italy".
- January 1797- Commands a Division besieging Mantua
- January 1797 - Writes insulting, insubordinate letter criticizing Napoleon's Chief-of-staff
- February 1797 - Demoted to brigade commander
- March 1797 - Wins praise while in command of advance guard. Given the equivalent of a Divisional Command
- April 1797 - Mentioned 3 times in dispatches for bravery under fire
- May 1797 - Divisional Commander of Calvary - M.G. of Treviso
- October 1797- At Home on extended leave
- April 1798 - Receives orders to join Egyptian Expedition
- May 1798 - Napoleon gives him command of a Calvary Division (3,000 men)
- July 1798 - Arrives Egypt. Criticized by Napoleon for insubordination, Fights "Battle of the Pyramids". Dumas asks to return to France - Napoleon agrees
- October 1798 - Dumas helps put down the Cairo Insurrection, Napoleon praises his valor
- January 1799 - Napoleon requests he stay in Egypt - Dumas Declines
- February 1799 - Leaves Egypt
POW and End of Military Career
- March 1799 - Taken Prisoner by Kingdom of Naples
- June 1801 - Returns to France
- October 1801 - Dumas requests a new Command; told "maybe"
- September 1802 - Against his wish, put on the Retired list -Annual pay is 4,000 francs
- October 1805 - Ill with stomach cancer
- February 1806 - Dies