| 11 Feb. 1862 | The Confederate forces entered New Mexico. |
| 21 Feb. 1862 | The Battle at Valverde, NM occurred. |
| 2 Mar. 1862 | Albuquerque, NM was abandoned by Union forces. |
| 3 Mar. 1862 | Confederate forces captured Cubero, NM. |
| 4 Mar 1862 | Santa Fe, NM was abandoned by Union forces. |
| 26 Mar. 1862 | Battle at Apache Canon, NM occurred. |
| 28 Mar. 1862 | Engagement at Glorieta Pass (Pigeon's Ranch) NM occurred. |
| 8 Apr. 1862 | Battle at Albuquerque, NM occurred. |
| 15 Apr. 1862 | Battle at Peralta, NM occurred. |
| 13 Apr. to 22 Apr. 1862 | Union forces pursued the Confederate forces. |
| 13 Apr. to 20 Sep. 1862 | Union forces departed Southern California crossing Arizona then to NW Texas and points in New Mexico. |
| 15 Apr. 1862 | The Battle at Peralta NM occurred, and the Battle at Picacho Pass, AZ occurred. |
| 25 Apr. 1862 | The Battle at Socorro, NM occurred. |
| 20 May 1862 | Tucson, Arizona was occupied by Union forces. |
| 21 May 1862 | A Battle occurred at Paraje, NM. |
| 23 May 1862 | A Battle occurred near Fort Craig, NM. |
| 8 Jun. 1862 | Martial law was proclaimed in Arizona. |
| 15 Jul. 1862 | Battle occurred at Apache Pass, AZ. |
Please submit other known engagements.