Book excerpt: The National Archives' celebrated First World War holdings include personal files of officers and other ranks, campaign medals, gallantry and meritorious service awards, courts martial and casualty lists. Its remarkable collection has records of Dominion forces and the Indian Army, the WAAC, the Royal Flying Corps and RAF, as well as auxiliary and nursing services. Over 10,000 individual unit war diaries cover all operational theatres of the British Army, while original trench maps illustrates areas from the Western Front to Salonica, Gallipoli to Mesopotamia, Palestine to Italy.