The Battle of Menin Road was an offensive operation, part of the Third Battle of Ypres on the Western Front, undertaken by the British Second Army in an attempt to take sections of the curving ridge, east of Ypres, which the Menin Road crossed. This action saw the first involvement of Australian units (1st and 2nd Divisions AIF) in the Third Battle of Ypres. The attack was successful along its entire front, though the advancing troops had to overcome formidable entrenched German defensive positions which included mutually supporting concrete pill-box strongpoints and also resist fierce German counter-attacks. A feature of this battle was the intensity of the opening British artillery support. The two AIF Divisions sustained 5,013 casualties in the action.