The Empire ships were a series of ships in the service of the British Government. Their names were all prefixed with "Empire". Mostly they were used during World War II by the Ministry of War Transport (MoWT), who owned the ships but contracted out their management to various shipping lines. Some ships requisitioned during the Suez Crisis were also given the Empire prefix. They were acquired from a number of sources. Many were built for the MoWT, others obtained from the USA, still others were captured or seized from enemy powers.