When the United States joined the war, Winston Churchill gave the U.S. military control of the Queen Mary to be used as the previously mentioned troop transport. The ship was stripped down to make room for the troops and the outside was painted a grey, prompting her to be given the nickname, the Grey Ghost. In all, over 800,000 soldiers were transported on 72 trips that covered 569,000 miles (16,000 soldiers could fit on board at one time). After the war, the Queen Mary was restored for passenger service. Not long after her arrival in Long Beach, some of the machinery and propellers were removed, rendering her permanently docked.