| Formation of the Volunteer Force | ||||||
| 1860: | 1st Sutherland AVC raised │ │ |
1st Caithness-shire AVC raised 2nd Caithness-shire AVC raised │ |
1st Ross-shire AVC raised │ │ |
1st Orkney AVC raised │ │ |
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| 1861: | │ │ |
3rd Caithness-shire AVC raised │ |
│ │ |
│ │ |
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| 1863: | │ │ │ │ |
│ │ │ │ |
│ │ │ │ |
2nd Orkney AVC raised 3rd Orkney AVC raised 4th Orkney AVC raised │ |
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| │ │ │ │ |
all part of 1st Administrative Brigade of Caithness-shire Artillery Volunteers │ |
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| 1865: | │ │ |
5th Orkney AVC raised │ |
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| 1866: | │ │ │ │ |
4th Caithness-shire AVC raised 5th Caithness-shire AVC raised 6th Orkney AVC raised │ |
2nd Ross-shire AVC raised attached to 1st Inverness-shire AVC |
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| 1867: | 2nd Sutherland AVC raised │ │ │ │ │ │ │ │ │ |
1st Orkney AVC → 2nd Orkney AVC → 3rd Orkney AVC → 4th Orkney AVC → 5th Orkney AVC → 6th Orkney AVC → 1st Ross-shire AVC to → │ │ │ |
→ 1st Ross-shire AVC attached to 1st Inverness-shire AVC |
→ 1st Orkney AVC → 2nd Orkney AVC → 3rd Orkney AVC → 4rd Orkney AVC → 5rd Orkney AVC → 6th Orkney AVC all part of 1st Administrative Brigade of Orkney Artillery Volunteers │ |
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| 1867: | 6th Caithness-shire AVC added 1st Sutherland AVC added 2nd Sutherland AVC added │ |
│ │ │ │ |
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| 1868: | │ │ |
7th Orkney AVC raised │ |
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| 1870: | │ │ |
8th Orkney AVC raised │ |
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| 1873: | 3rd Caithness-shire AVC disbanded │ |
│ │ |
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| 1874: | │ │ |
9th Orkney AVC raised │ |
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| 1877: | │ │ |
7th Orkney AVC disbanded │ |
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| 1878: | 6th Caithness-shire AVC disbanded │ |
10th Orkney AVC raised │ |
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| Consolidation and renumbering of the Volunteer Force | ||||||
| │ | │ | |||||
| 1880: | consolidated as 1st Caithness-shire (Caithness and Sutherland) Artillery Volunteer Corps │ |
consolidated as 1st Orkney Artillery Volunteer Corps │ │ |
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| Creation of the Divisons, Royal Artillery | ||||||
| │ | │ | |||||
| 1882: |
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| Regrouping into three large divisions | ||||||
| │ | │ | |||||
| 1889: |
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| 1891: | 1st Caithness-shire (Caithness and Sutherland) Volunteer Artillery Corps │ |
1st Orkney Volunteer Artillery Corps │ │ |
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| Transferred to the Royal Garrison Artillery | ||||||
| │ | │ | |||||
| 1899: | │ │ |
│ │ |
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| Division system abolished | ||||||
| │ | │ | |||||
| 1902: | 1st Caithness-shire Royal Garrison Artillery (Volunteers) |
1st Orkney Royal Garrison Artillery (Volunteers) |
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| Creation of the Territorial Force | ||||||
| │ | │ | |||||
| 1908: | disbanded | Orkney Royal Garrison Artillery (TF) | ||||
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| 1918: | suspended animation │ |
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| 1920: | Orkney Royal Garrison Artillery (TF) │ |
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| Creation of the Territorial Army | ||||||
| │ | ||||||
| 1921: | Orkney Coast Brigade, Royal Garrison Artillery (TA) |
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| 1922: | suspended animation │ |
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| 1938: | Orkney Heavy Regiment, Royal Artillery (TA) │ |
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| 1940: | 533rd (Orkney) Coast Regiment, Royal Artillery (TA) │ |
534th (Orkney) Coast Regiment, Royal Artillery (TA) │ |
535th (Orkney) Coast Regiment, Royal Artillery (TA) │ |
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| 1945: | │ │ |
suspended animation │ |
suspended animation │ |
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| 1946: | suspended animation │ |
│ │ |
│ │ |
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| Resurrection of the Territorial Army | ||||||
| │ | │ | │ | ||||
| 1947: | 430th Coast Regiment, Royal Artillery (Orkney) (TA) │ |
disbanded | disbanded | |||
| 1951: | 430th Coast Regiment, Royal Artillery (Orkney and Zetland) (TA) │ |
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| 1956: | 861st (Independent) Light Anti-Aircraft Battery, Royal Artillery (TA) (Orkney and Zetland) │ |
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| 1961: | Q (Orkney and Zetland) Battery, 540th Light Anti-Aircraft Regiment Royal Artillery (TA) (Lovat Scouts) |
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