The invasion plan called for two brigades of the 3rd Canadian Division to land on two beach sectors—Mike and Nan—focusing on Courseulles, Bernières and Saint-Aubin. It was hoped that the preliminary naval and air bombardments would soften up the beach defences and destroy coastal strong points. Close support on the beaches was to be provided by amphibious tanks of the 2nd Canadian Armoured Brigade and specialized armoured vehicles of the 79th Armoured Division of the United Kingdom. Once the landing zones were secured, the plan called for the 9th Canadian Infantry Brigade to land reserve battalions and deploy inland, the Royal Marine commandos to establish contact with the British 3rd Infantry Division on Sword and the 7th Canadian Infantry Brigade to link up with the British 50th Infantry Division on Gold. The 3rd Canadian Division's D-Day objectives were to capture Carpiquet Airfield and reach the Caen–Bayeux railway line by nightfall.