The Battle of Bardia was fought over three days between 3 and 5 January 1941, as part of Operation Compass, the first military operation of the Western Desert Campaign of the Second World War. It was the first battle of the war in which an Australian Army formation took part, the first to be commanded by an Australian general and the first to be planned by an Australian staff. Major General Iven Mackay's 6th Division assaulted the strongly held Italian fortress of Bardia, Libya, assisted by air support and naval gunfire, and under the cover of an artillery barrage. The 16th Infantry Brigade attacked at dawn from the west, where the defences were known to be weak. Sappers blew gaps in the barbed wire with Bangalore torpedoes and filled in and broke down the sides of the anti-tank ditch with picks and shovels.