 Complete the following phrase:  During a convoy to Malta in January 1942, the ship was detailed to escort the merchant ship Thermopylae to Benghazi when she started having engine trouble. En route, however, Thermopylae was sunk by air attack on 19 January. On 23 March Hotspur was transferred to the Eastern Fleet in the Indian Ocean and was assigned to Force A of the fleet during the Indian Ocean raid by the Japanese in early April 1942. The ship returned to the Mediterranean to participate in Operation Vigorous, another convoy from Alexandria to Malta, in June. Hotspur was forced to sink her sister, Hasty, after the latter was damaged by a torpedo from German motor torpedo boat S-55. After the ship returned to the Indian Ocean, she escorted the carrier when that ship supported operations on 