Jenny Lewis explores finding information about her father who served in Mesopotamia (modern-day Iraq) during World War I. There are several sources that can provide insight such as family archives, local history societies, national archives, museums, and the internet. The document discusses the British campaign in Mesopotamia from 1914-1918, including taking control of Basra in 1914 and occupying it to gain control of the oilfields. However, the poorly equipped British forces suffered over a million deaths over four years as they unsuccessfully tried to take Baghdad.