Highland Volunteers
| Dates | Locations | Higher Formation/Remarks |
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| . | 51st Highland Volunteers | . |
| 1967.04.01 | Formed in TAVR II with HQ at Perth, and companies serving as successors to former TA battalions in the Highland Brigade: | . |
| . | HQ Company (Black Watch) at Perth, successor to 6th/7th Bn The Black Watch | . |
| . | A Company (Black Watch) at Dundee, successor to 4th/5th Bn The Black Watch | . |
| . | B Company (Seaforth) at Wick, successor to 11th Bn Seaforth Highlanders, and 540th LAD Regiment, RA | . |
| . | C Company (Cameron) at Inverness, successor to 4th/5th Bn The Queen's Own Cameron Highlanders | . |
| . | D Company (Gordon) at Aberdeen, successor to 3rd Bn The Gordon Highlanders | . |
| . | E Company (Argyll and Sutherland Highlanders) at Stirling, successor to 7th Bn and 8th Bn The Argyll and Sutherland Highlanders | . |
| . | G Company (London Scottish) at Westminster, London, successor to 1st Bn The London Scottish | . |
| . | V Company (Liverpool Scottish) at Score Lane, Liverpool, successor to 1st Bn The Liverpool Scottish | . |
| 1969.04.01 | HQ Coy formed pln at Kirkcaldy; C Coy formed pln at Elgin and Dingwall; D Coy formed pln at Keith; three new companies formed from disbanding TAVR III units: | . |
| . | No.1 (Lovat Scouts) Company at Kirkwall with Pln at Lerwick | . |
| . | No.2 (Queen's Own Highlanders) Company at Fort William with Pln at Stornoway | . |
| . | No.3 (Argyll and Sutherland Highlanders) Company at Dumbarton with Pln at Campbeltown | . |
| 1971.04.01 | Redesignated 1st Battalion, 51st Highland Volunteers on formation of 2nd Battalion; HQ at Perth; companies reorganised: B Coy, C Coy, D Coy, No.1 Coy and No.2 Coy transferred to 2nd Battalion as its B Company, C Company, D Company, A Company and E Company respectively | . |
| . | HQ (The Black Watch) Company at Perth | . |
| . | A (The Black Watch) Company at Dundee | . |
| . | B (The Black Watch) Company at Kirkcaldy, formed from cadre 3rd Bn The Black Watch and Kirkcaldy pln HQ Coy | . |
| . | C (The Argyll and Sutherland Highlanders) Company at Grangemouth, formed from cadre 3rd Bn The Argyll and Sutherland Highlanders | . |
| . | D (The Argyll and Sutherland Highlanders) Company at Dumbarton with Pln at Campbelltown, formed by redesignation of No. 3 Coy | . |
| . | E (The Argyll and Sutherland Highlanders) Company at Stirling | . |
| . | G (The London Scottish) Company at Westminster, London | . |
| . | V (The Liverpool Scottish) Company at Score Lane, Liverpool | . |
| 1975.04.01 | C Coy at Grangemouth transferred as C Company 3rd Battalion; D Coy at Dumbarton and Cambeltown transferred as D Company 3rd Battalion; B Coy at Kirkcaldy redesignated as K Company | . |
| 1981.01.01 | E Coy transferred as A Company 3rd Battalion | . |
| 1984 | Z (HSF) Company formed at Perth, Kirkcaldy and Dundee | . |
| 1992-1993 | Reorganised into a three rifle company order of battle and company subtitles omitted, effectively making battalion an all Black Watch unit: Z (HSF) Coy disbanded; V Coy transferred 21 Sep. 1992 as V Company 5th/8th (V) Bn The King's Regiment; G Coy transferred 20 Apr. 1993 as A Company The London Regiment | . |
| . | HQ Company at Perth | . |
| . | A Company at Dundee | . |
| . | B Company at Forfar, newly raised July 1992 | . |
| . | K Company at Kirkcaldy | . |
| 1994.12.31 | Redesignated as 3rd (Volunteer) Battalion, The Black Watch (Royal Highland Regiment) | . |
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| . | 2nd Battalion, 51st Highland Volunteers | . |
| 1971.04.01 | Formed with HQ at Elgin from cadres of former TAVR III battalions and companies of 1st Battalion | . |
| . | HQ (Queen's Own Highlanders and Gordon Highlanders) Company at Elgin with dets at Keith and Buckie as Admin Pln, from cadre 3rd (T) Bn The Queen's Own Highlanders and Plns C Coy and D Coy 1st Battalion | . |
| . | A (The Lovat Scouts) Company at Kirkwall with Pln at Lerwick, redesignation of No. 1 Coy 1st Battalion | . |
| . | B (Queen's Own Highlanders) Company at Wick with dets at Brora and Thurso, redesignation of B Coy 1st Battalion | . |
| . | C (Queen's Own Highlanders) Company at Inverness with dets at Dingwall, Fort William and Newtonmore, redesignation of C Coy 1st Battalion and Fort William Pln No. 2 Coy 1st Battalion | . |
| . | D (The Gordon Highlanders) Company at Aberdeen (det at Laurencekirk), redesignation of D Coy 1st Battalion | . |
| . | E (Queen's Own Highlanders) Company at Stornoway (det at Portree), redesignation of No. 2 Coy 1st Battalion | . |
| . | G (The Gordon Highlanders) Company at Aberdeen (det at Peterhead), from cadre 3rd (T) Bn The Gordon Highlanders | . |
| 1975.04.01 | HQ Company formed by expansion existing elements; B Coy transferred as B Company 3rd Battalion; C Company absorbed E Coy (and Portree det disbanded), forming platoon at Stornoway; D Company absorbed G Coy | . |
| 1981.01.01 | Companies reorganised: | . |
| . | HQ (Queen's Own Highlanders and Gordon Highlanders) Company at Elgin with dets at Keith and Buckie | . |
| . | A (Queen's Own Highlanders and Lovat Scouts) Company at Wick (dets at Thurso and Brora) with Lovat Scouts platoon at Kirkwall, amalgamation of elements late A Company, and B Company 3rd Battalion | . |
| . | B (Gordon Highlanders) Company at Peterhead (det at Keith), redesignation of HQ Company 3rd Battalion | . |
| . | C (Queen's Own Highlanders) Company at Inverness (dets at Dingwall, Fort William, Newtonmore and Stornoway) | . |
| . | D (Gordon Highlanders and Lovat Scouts) Company at Aberdeen (det at Laurencekirk) with Lovat Scouts platoon at Lerwick, formed by reorganisation of D Coy with elements late A Coy | . |
| 1984 | Y (HSF) Company formed at Elgin, Inverness, Stornoway, Wick and Kirkwall | . |
| . | X (HSF) Company formed at Aberdeen, Lerwick, Peterhead and Laurencekirk | . |
| 1992 | Y (HSF) Coy and X (HSF) Coy disbanded | . |
| 1993.03 | Reorganised into three rifle company establishment: A Coy at Wick and Kirkwall reorganised as Support Group with additional elements at Dingwall | . |
| 1995.02.10 | Redesignated as 3rd (Volunteer) Battalion, The Highlanders (Seaforth, Gordons and Camerons) with HQ at Elgin | . |
| . | HQ Company at Elgin, Support Group at Wick with Pln at Dingwall and Lovat Scouts Platoon at Kirkwall | . |
| . | B Company at Peterhead with Plns at Keith and St Andrews | . |
| . | C Company at Inverness with Plns at Fort William and Stornoway | . |
| . | D Company at Aberdeen with Pln at Laurencekirk and Lovat Scouts Platoon at Lerwick | . |
| 1999.07.01 | 51st Highland RegimentÃÂ formed by amalgamation of 3rd (V) Battalion, The Black Watch, 3rd (V) Bn, The Highlanders, and 7th/8th (V) Bn, The Argyll and Sutherland Highlanders), HQ at Perth | . |
| . | B (Highlanders) Company at Peterhead with sub-units at Aberdeen, Elgin and Keith, amalgamation of HQ Coy, B Coy and D Coy | . |
| . | C (Highlanders) Company at Inverness with sub-units at Wick, Stornoway, and Lovat Scouts at Kirkwall and Lerwick, SF and Assault Pioneer Pln attached, amalgamation of C Coy, detachment D Coy and Support Group | . |
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| . | 3rd Battalion, 51st Highland Volunteers | . |
| 1975.04.01 | Formed, C Coy and D Coy 1st Battalion transferred as C Company and D Company respectively, HQ at Peterhead | . |
| 1981.01.01 | Battalion HQ moved to Stirling and companies reorganised, effectively making the battalion an A&SH unit: | . |
| . | HQ Company at Stirling, newly raised | . |
| . | A (The Argyll and Sutherland Highlanders) Company at Stirling, redesignation of E Coy 1st Battalion | . |
| . | C (The Argyll and Sutherland Highlanders) Company at Grangemouth | . |
| . | D (The Argyll and Sutherland Highlanders) Company at Dumbarton with Plns at Campbelltown and Dunoon | . |
| 1984 | W (HSF) Company formed at Stirling, Dumbarton and Grangemouth | . |
| 1985.01.01 | Renamed 3rd Battalion, 51st Highland Volunteers (The Argyll and Sutherland Highlanders) | . |
| . | B Company formed at Cumbernauld | . |
| 1992 | W (HSF) Coy disbanded | . |
| 1993.03 | Reorganised into a three rifle company establishment: | . |
| . | HQ Company at Stirling, absorbed A Coy | . |
| . | B Company at Cumbernauld | . |
| . | C Company at Falkirk (moved from Grangemouth) | . |
| . | D Company at Dumbarton with Plns at Campbelltown and Dunoon | . |
| 1995.02.10 | Renamed 7th/8th (Volunteer) Battalion, The Argyll and Sutherland Highlanders (Princess Louise's) | . |
| . | HQ Company at Meadowforth Road, Stirling | . |
| . | B Company at Cumbernauld | . |
| . | C Company at Falkirk | . |
| . | D Company at Dumbarton with Pln at Dunoon | . |
| 1999.07.01 | 51st Highland RegimentÃÂ formed by amalgamation of 3rd (V) Battalion, The Black Watch, 3rd (V) Bn, The Highlanders, and 7th/8th (V) Bn, The Argyll and Sutherland Highlanders), less C Coy at Falkirk disbanded, HQ at Perth | . |
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