 In May 1915, Hamilton decided to concentrate his resources in the Helles sector.Birdwood withdrew Colonel McCay's 2nd Infantry Brigade and the New Zealand Infantry Brigade and they moved by sea to Cape Helles on 6 May.During the subsequent Second Battle of Krithia the two brigades suffered 1,827 casualties, including McCay, in an ill-advised daylight advance over open ground that could have been occupied after dark without loss.