 Complete the following phrase:  In early 1917, the 4th Light Horse Brigade was reconstituted at Ferry Post on 13 February under the command of Brigadier General John Meredith. Assigned to the brigade along with the 4th and 11th Light Horse Regiments, the regiments time of operating as a detached unit came to an end; they officially readopted the designation of 12th Light Horse Regiment at this time. For the next month they undertook training exercises before joining the advance into Palestine, while some men from the regiment were also detached to join Dunsterforce in Persia. In April, the regiment took part in the 