Street arrived in Alexandria, Egypt, in early December. After further training his battalion sailed via Lemnos to participate in the Gallipoli campaign. He participated in the Landing at Anzac Cove on 25 April 1915 as platoon commander of "D" Company. He and his men reinforced a hill named Baby 700 and succeeded in holding the position for several days. Street received a "slight" wound to the head and was evacuated back to Egypt, where he was promoted to full lieutenant with effect from 26 April. He returned a month later and led a mission on 4 June to eliminate an Ottoman machine-gun, which ended in him "unexpectedly stumbling into Turkish troops in a supposedly unoccupied 'sniper’s trench'". His sergeant on the mission Harry Freame became a lifelong friend. Street was subsequently appointed acting adjutant of the 1st Battalion and in November was promoted to captain. He and the 1st Battalion were evacuated to Egypt the following month.