Prior to the British landings, the Argentinian marine battalion had been brought up to brigade strength by a company of the Amphibious Engineers Company (CKIA), a heavy machine-gun company of the Headquarters Battalion (BICO), a battery of the 1st Marine Field Artillery Battalion (BIAC), and three Tigercat SAM/Hispano-Suiza 30mm anti-aircraft gun batteries of the 1st Marine Anti-Aircraft Regiment, as well as a 2nd Marine Infantry Battalion platoon, a 3rd Marine Infantry Battalion platoon, a military police platoon and a canine platoon.