 Complete the following phrase:  In October 1914, Antill volunteered for overseas service with the Australian Imperial Force. As a regular officer, he was assigned to the 3rd Light Horse Brigade as brigade major, under the command of Colonel Frederic Hughes. He departed for the Middle East on 25 February 1915 on the Transport A16 Star of Victoria, reaching Egypt where the brigade undertook further training. In May, the light horsemen were sent to Anzac Cove as dismounted reinforcements; initially, Antills brigade undertook mainly defensive duties. However, in an effort to break the deadlock they were committed to the August Offensive. During the fierce fighting at 