Agents of Empire is the story of a unique partnership, forged by war and matured in friendship. Brigadier Walter Gribbon, formerly of the King's Own Royal Regiment, after junior staff service in the early stages of the Mesopotamian Campaign of World War I, was posted to the War Office to serve as a major under Major General George Macdonogh, the Director of Military Intelligence. Aaron Aaronsohn was a distinguished agronomist working in Palestine, occasionally in the Turkish Administration.

He was also a Jew and Zionist.

Increasingly convinced that a future for his people depended on British support, Aaronsohn and his family offered their services as intelligence agents to the British in Cairo. They were rebuffed. Aaron then journeyed from Damascus to London, where, in October 1916, he met Walter Gribbon.

With the support of Zionists such as Mark Sykes and Wyndham Deedes, Gribbon and Aaronsohn set in train an intelligence operation which greatly helped General Allenby to defeat the Turkish Army in the Levant to give Britain its 'moment' in the Middle East and lay the foundations for a Zionist state.

Bringing together for the first time Gribbon's private papers and Aaronsohn's diaries, in addition to other previously unpublished material, Agents of Empire reveals the extent of British political and strategic support for a Zionist state in the latter part of World War I.