In the
Defence Act of 1958, the decided that eight armoured brigades with new combat vehicles would be organized in the army. The decision was changed for economic reasons in August 1960 to include only seven armoured brigades. Four infantry regiments, the
North Scanian Infantry Regiment (I 6),
South Scanian Infantry Regiment (I 7),
Södermanland Regiment (I 10) and
Gotland Infantry Regiment (I 18), were transferred from the infantry to the armoured forces. There was a detachment of the
Göta Armoured Life Guards (P 1) on Gotland since 1944, the
Göta Armoured Life Guards' Company in Gotland (P 1 G). The detachment was amalgamated on 1 April 1963 with the new Gotland Regiment, forming the backbone of the new armoured regiment. The Gotland Regiment was also given the new designation P 18 instead of its previous designation I 18 as an infantry regiment. After I 18 was amalgamated with P 1 G to P 18 in 1963, the armored brigade thus became reorganized into five large battalions with
KP-bil (instead of bicycles) with each two companies of either
tank destroyers or
Stridsvagn 74. During the 1970s, the brigade was re-armored with
Stridsvagn 102, which, like the KP-bil, underwent a renovation in the 1980s. As part of the so-called OLLI reform, which was carried out by the
Swedish Armed Forces in 1973 and in 1975, A units and B units were created. The A units were regiments responsible for a
defence district and the B units were training regiments. In Gotland's case, the VII Military District was reorganized into
Gotland Military Command (MKG) in 1966. The military command was a special
command and control organization within the
Eastern Military District, but did not have the overall responsibility for the administration of the island. The Gotland Regiment, which was included in the Gotland Military Command (MKG), was a B unit (training regiment) from 1 July 1974. Prior to the Defence Act of 1977, the Swedish Armed Forces Peace Organization Investigation (, FFU) proposed to the that the Gotland Regiment (P 18),
Gotland Artillery Regiment (A 7) and
Gotland Anti-Aircraft Battalion (Lv 2) would be merged into one army regiment. However, the
Committee on Defence and the
Minister for Defence felt that no decision would be taken before the issue of further land acquisition in connection to Visborgs slätt had been resolved. In the autumn of 1980, the issue was considered sufficiently resolved when the decided on 16 October 1980 to merge the army units into an army regiment. From 1 July 1982 the regiment was subordinate to the commanding officer of the
Gotland Military Command (MKG). The Gotland Regiment was disbanded on 31 December 2004. From 1 January 2005, the regiment changed name to the Decommissioning Organization P 18 (), which would account for the disbandment of the regiment, which would be completed on 31 August 2006. On 28 May 2005 the official disbandment of the regiment took place. In September 2017, the Minister for Defense presented the proposal that the regiment would be re-formed on 1 January 2018. The confirmed the decision on 13 December 2017. and will reach its full strength of 350 by 2020. ==Campaigns==