Mr Morrison visited the 800 Australian defence personnel who are serving at two operating bases in the Middle East.
United States President Donald Trump says he will begin removing troops from Syria, in a move which has shocked even his own government.
US troops had been in the country to eliminate the control of I-S, but President Trump says they are no longer necessary because I-S has been defeated but many believe while I-S forces have been decimated, they still could pose a threat to the region.
