Appendix D: Office of the Chief, CWS, Officer Personnel Strength, August 1939 to December 1945
| End of month | Total | Regular Army | Other* |
| 1939 | |||
| August | 12 | 12 | 0 |
| September | 11 | 11 | 0 |
| October | 11 | 11 | 0 |
| November | 11 | 11 | 0 |
| December | 11 | 11 | 0 |
| 1940 | |||
| January | 12 | 12 | 0 |
| February | 11 | 11 | 0 |
| March | 14 | 11 | 3 |
| April | 16 | 11 | 5 |
| May | 16 | 11 | 5 |
| June | 20 | 12 | 8 |
| July | 22 | 13 | 9 |
| August | 24 | 13 | 11 |
| September | 28 | 14 | 14 |
| October | 30 | 15 | 15 |
| November | 31 | 15 | 16 |
| December | 34 | 15 | 19 |
| 1941 | |||
| January | 37 | 15 | 22 |
| February | 40 | 16 | 24 |
| March | 41 | 17 | 24 |
| April | 42 | 16 | 26 |
| May | 45 | 17 | 28 |
| June | 49 | 18 | 31 |
| July | 52 | 19 | 33 |
| August | 63 | 22 | 41 |
| September | 76 | 22 | 54 |
| October | 92 | 22 | 70 |
| November | 99 | 22 | 77 |
| December | 109 | 22 | 87 |
| 1942 | |||
| January | 124 | 22 | 102 |
| February | 141 | 21 | 120 |
| March | 164 | 19 | 145 |
| April | 190 | 21 | 169 |
| May | 188 | 20 | 168 |
| June | 177 | 18 | 159 |
| July | 213 | 19 | 194 |
| August | 212 | 17 | 195 |
| September | 217 | 16 | 201 |
| October | 206 | 18 | 188 |
| November | 217 | 15 | 202 |
| December | 232 | 15 | 217 |
| 1943 | |||
| January | 221 | 12 | 209 |
| February | 229 | 12 | 217 |
| March | 238 | † 15 | † 223 |
| April | 233 | 233 | |
| May | 242 | 242 | |
| June | 257 | 257 | |
| July | 243 | 243 | |
| August | 220 | 220 | |
| September | 230 | 230 | |
| October | 234 | 234 | |
| November | 234 | 234 | |
| December | 231 | 231 | |
| 1944 | |||
| January | 230 | 230 | |
| February | 234 | 234 | |
| March | 237 | 237 | |
| April | 236 | 236 | |
| May | 236 | 236 | |
| June | 244 | 244 | |
| July | 245 | 245 | |
| August | 257 | 257 | |
| September | 260 | 260 | |
| October | 260 | 260 | |
| November | 257 | 257 | |
| December | 254 | 254 | |
| 1945 | |||
| January | 253 | 253 | |
| February | 258 | 258 | |
| March | 260 | 260 | |
| April | 258 | 258 | |
| May | 252 | 252 | |
| June | 231 | 231 | |
| July | 262 | 262 | |
| August | 259 | 259 | |
| September | 231 | 231 | |
| October | 213 | 213 | |
| November | 208 | 208 | |
| December | 174 | 174 | |
* Includes National Guard, Officer Reserve Corps, and Army of United States officers.
† Breakdown by component not made after 20 March 1943.
Source: Office of the Comptroller, Department of the Army, Statistics Branch (Squier/Pentagon 2B673) from: (1) Monthly Report of Personnel Activities, WDAGO 73; (2) Monthly Report of Authorizations and Strength for Personnel Operating the Z of I Establishment, WDGS Control Symbol SM—P2-39; (3) Monthly Report of Personnel Authorizations and Strengths for Establishments in Area of District of Columbia and Arlington County, Va., WDMB Form 114, WDGS SM—P2-40; (4) Photostats of Monthly Strength Reports in Statistical Branch, PRAD, OCA.
Table data merged onto previous page