When the British army conquered Italian Eritrea in January 1941, most of the infrastructure and the industrial areas were extremely damaged and the remaining ones (like the Asmara-Massawa Cableway) were successively removed and sent toward India and British possessions in Africa as a war booty.
The Italians in Eritrea started to move away from the country after the defeat of the Kingdom of Italy by the Allies, and by the time of the British census of 1949 Asmara had only 17,183 Italian Eritreans of a total population of 127,579. Most Italian settlers left for Italy, with others to United States, Middle East, and Australia.
The British maintained initially the Italian administration of Eritrea, but the country soon started to be involved in a violent process of independence (from the British in the late forties and after 1952 from the Ethiopians, who annexed Eritrea in that year).