ACTUAL STRENGTH OF THE MARINE CORPS AT THE BEGINNING AND END OF THE WAR.
On April 6, 1917, the strength of the Marine Corps on active duty was as follows:
On November 11, 1918, the strength of the Marine Corps on active duty was as follows:
| Regular commissioned officers: | |
| Major General Commandant | 1 |
| Major generals | 2 |
| Brigadier generals | 13 |
| Colonels | 43 |
| Lieutenant-colonels | 52 |
| Majors | 199 |
| Captains | 522 |
| First lieutenants | 436 |
| Second lieutenants | 413 |
| Total Regular officers | 1,681 |
| Commissioned retired officers: | |
| On active duty | 43 |
| Reserve officers on active duty: | |
| Majors | 7 |
| Captains | 33 |
| First lieutenants | 63 |
| Second lieutenants | 360 |
| Total Reserve officers | 463 |
| Total commissioned officers on active duty | 2,187 |
| Regular warrant officers: | |
| Marine gunners | 109 |
| Quartermaster clerks | 89 |
| Pay clerks | 56 |
| Total | 254 |
| Reserve warrant officers: | |
| Marine gunners | 27 |
| Quartermaster clerks | 2 |
| Pay clerks | 4 |
| Total | 33 |
| Total warrant officers on active duty | 287 |
| Total officers on active duty | 2,474 |
| Enlisted personnel: | |
| Regular | 63,714 |
| Retired enlisted men on active duty | 15 |
| Reserves, on active duty | 6,483 |
| Female reservists, on active duty | 277 |
| Total | 70,489 |
| Total strength on active duty | 72,963 |
On December 11, 1918, the Marine Corps attained its maximum strength on active duty, which was distributed as follows:
| Regular commissioned officers | 1,678 |
| Retired officers on active duty | 44 |
| Reserve commissioned officers | 452 |
| Regular warrant officers | 257 |
| Reserve warrant officers | 31 |
| Regular enlisted men | 65,666 |
| Reserve enlisted men | 6,704 |
| Female reservists | 269 |
| Total | 75,101 |
The maximum enlisted strength of the regular Marine Corps, not including reserves, during the period between the outbreak of war and the date the armistice became operative was 63,714 on November 9, 1918.