The 1st and 2nd Light Horse Brigades first made contact with the New Zealand Mounted Rifles Brigade by heliograph, after which Royston, commanding the 2nd Light Horse Brigade, galloped across to explain the situation. Chaytor then moved the Auckland and Canterbury Mounted Rifles Regiments, supported by the Somerset Battery, onto high ground between the right of the light horse and the Yeomanry, which was shortly afterwards joined by the remainder of the 5th Mounted Brigade under the command of Brigadier General Wiggin. At the most critical period of the day's fighting, when the German and Ottoman force of 2,000 dominated the Romani area from Mount Royston, the five mounted brigades (still less the 5th Light Horse Regiment) began their counterattack at 14:00 from the west towards Mount Royston.