In 1839, Aden became part of the British Empire and was administered by the Bombay Presidency. A garrison of 2000 Indian soldiers was established in Aden and the Indian Rupee was made the official currency. In 1855, a fortnightly steamer service with Bombay was initiated by Peninsular and Orient Line. Engineer of India, was sent by the British to Aden in 1906 to lay out an effective underground drainage system and to prepare a scheme for providing drinking water.
During the outbreak of the Civil War India took a neutral stand. Indian doctors and nurses were perhaps the only expatriates who stayed behind and rendered humanitarian services to the people of Yemen. In July 1994, following the successful conclusion of the Civil War, the Government of Yemen sought the help of the Government of India in admitting over 150 war-wounded persons for medical treatment in the hospitals in Bombay, which was readily agreed to by the Indian side.