The Najran conflict was a poorly documented conflict over Najran in the 1930s fought between the Mutawakkilite Kingdom of Yemen and the Kingdom of Hejaz and Nejd. All known details are provided on page 322 of St John Philby's 1955 book Saudi Arabia, which gives the following account: — St John Philby, Saudi Arabia The conflict is also mentioned on page 54 of Nadav Safran's 1988 book Saudi Arabia: The Ceaseless Quest for Security, which gives a similar account, likely based on that of Philby: — Nadav Safran, Saudi Arabia: The Ceaseless Quest for Security