Conversation so far:
what was bernards academic career like?
In 1936, Lewis graduated from the School of Oriental Studies (now School of Oriental and African Studies, SOAS) at the University of London with a BA in history.
what did he do after he graduated?
He earned his PhD three years later, also from SOAS, specializing in the history of Islam.
what was his job after graduating with the PHD?
He undertook post-graduate studies at the University of Paris, where he studied with the orientalist Louis Massignon and earned the "Diplome des Etudes Semitiques" in 1937.
Are there any other interesting aspects about this article?
Lewis served in the British Army in the Royal Armoured Corps and as a Corporal in the Intelligence Corps in 1940-41 before being seconded to the Foreign Office.
why was he seconded to the foreign office?
CANNOTANSWER.

Question: what was his greatest accomplishment?
Self-contained rewrite: what was Bernard Lewis' greatest accomplishment?