In 1982, following the Argentinean invasion of the Falkland Islands, 40 Commando deployed on Operation Corporate as part of 3 Cdo Bde.
On 21 May the Commando were among the first troops ashore and secured the beachhead at San Carlos. The Unit was subsequently split having two companies attached to the Welsh Guards, preparing to attack Port Stanley, when the Argentinean surrender came.
On 15 June 1982, one day after the main Argentine surrender, Royal Marines of B Coy, 40 Commando flew in SeaKings to Port Howard, unsure if the Argentines would surrender with-out a fight around 850 members of Fifth Motorized Infantry Regiment including 601 Commando laid down their arms.
In Port Howard AE Troop cleared anti tank, A/P mines and booby traps, pipe bombs were disarmed by hand.
40 Commando embarked on Canberra on the 24th June and left for home on the 25th June at 17:22 after having their passports stamped by Falklands Immigration.