Formation Formed on 5 August 1940 at
Crumlin after gathering in
Belfast and
Derry in
Northern Ireland, under the command of Lieutenant Colonel S. Harrison, the unit, although technically a part of the Special Service Brigade under Brigadier Joseph (Charles) Haydon, largely remained independent of it and carried out small scale raiding and sabotage operations. The new unit was drawn from Irish regiments and from the 53rd and 61st Divisions which were based in Northern Ireland at the time. On 9 December 1941, a detachment from No. 12 Commando, along with a detachment from
No. 6 Commando and some Norwegian soldiers, took part in
Operation Kitbag, a raid on the town of Florø in
Norway. Embarking on , an infantry landing ship, they set out from
Scapa Flow. During the voyage an incident occurred while some of the men were priming
grenades for the raid which resulted in six men were killed and another 11 were seriously wounded, nevertheless the decision was made to continue with the raid. In the end, however, due to navigational difficulties the operation was eventually called off when the naval commander was unable to locate the fjord upon which Floss was located. The operation was a diversionary raid on the
Lofoten Islands in
Norway, as part of the wider
Operation Archery, which was a larger commando raid on
Vågsøy and
Måløy. No. 12 Commando along with 68 Norwegians from
Norwegian Independent Company 1 and a demolition party landed on the island capturing the German garrison who surrendered without a fight. Under Harrison's command, they landed at Reine and after the garrison surrendered, the commandos stayed on the island for two days to carry out demolitions work, destroying two German wireless stations before withdrawing. They took 29 German prisoners and over 200 volunteers for the free Norwegian forces in Britain with them. On 27/28 February 1942, a detachment took part in the
Bruneval Raid, providing the recovery parties for the paratroops. Later other detachments took part in the
St Nazaire Raid and a raid on Sark known as
Operation Basalt. In total the commando played a part in at least 15 raids between 1941 and late 1943. In addition to this, the losses suffered by the commando units serving in North Africa and Italy needed to be replaced. At the time there were widespread shortages across the entire British Army, and the volunteer nature of the commandos meant that there were even greater difficulties to replace commando losses. As a result, it was decided that some of these losses could be made up by disbanding No. 12 Commando. Following the disbandment of the unit, many of the unit's personnel were transferred to other commando units, namely
Nos. 1,
3,
5 and
6 Commandos. ==Battle honours==