Until 1937 there was no Territorial Army in Ireland. Volunteer units were created in the Supplementary Reserve.
| 1939: | 102nd Anti-Aircraft Regiment, Royal Artillery (TA) |
8th Anti-Aircraft Regiment, Royal Artillery (SR) |
9th Anti-Aircraft Regiment, Royal Artillery (SR) |
3rd Searchlight Regiment, Royal Artillery (SR) |
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| 1940: | 102nd Heavy Anti-Aircraft Regiment, Royal Artillery │ │ |
8th (Belfast) Heavy Anti-Aircraft Regiment, Royal Artillery (SR) │ |
9th (Londonderry) Heavy Anti-Aircraft Regiment, Royal Artillery (SR) │ |
3rd (Ulster) Searchlight Regiment, Royal Artillery (SR) │ │ |
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| 1942: | │ │ │ |
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4th (Ulster) Light Anti-Aircraft Regiment, Royal Artillery (SR) │ |
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| 1944: | suspended animation │ |
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| 1946: | │ │ |
suspended animation │ |
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| 1947: | │ │ |
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suspended animation │ |
suspended animation │ |
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| Resurrection of the Territorial Army | ||||||
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| 1947: | 502nd (Mixed) Heavy Anti-Aircraft Regiment, Royal Artillery (Ulster) (TA) │ |
245th (Mixed) Heavy Anti-Aircraft Regiment, Royal Artillery (Belfast) (TA) │ |
246th (Mixed) Heavy Anti-Aircraft Regiment, Royal Artillery (Derry) (TA) │ |
247th Light Anti-Aircraft Regiment, Royal Artillery (Ulster) (TA) │ │ |
248th Light Anti-Aircraft Regiment, Royal Artillery (Ulster) (TA) │ │ |
661st Field Regiment, Royal Artillery (Ulster) (TA) │ │ |
| 1949: | │ │ │ │ │ |
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247th Light Anti-Aircraft/ Searchlight Regiment, Royal Artillery (Ulster) (TA) │ |
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| 1953: | │ │ │ |
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661st (Ulster) Field Regiment, Royal Artillery (TA) │ |
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| 1955: | 245th (Ulster) Light Anti-Aircraft Regiment, Royal Artillery (TA) │ |
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| 1964: | 245th (Ulster) Light Air Defence Regiment, Royal Artillery (TA) │ |
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| Creation of the Territorial and Army Volunteer Reserve | ||||||
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| 1967: | disbanded and formed HQ Battery, 206th (Ulster) Light Air Defence Battery, 102nd (Ulster and Scottish) Light Air Defence Regiment, Royal Artillery (Volunteers) |
disbanded and formed part of 6th (Territorial) Battalion, The Royal Ulster Rifles |
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