ALBAWABA—Saudi King Salman bin Abdulaziz has issued a series of royal decrees that significantly change the kingdom’s military leadership. Among the key decisions, General Mutlaq Al-Azima, the Commander of the Joint Forces in Yemen—an alliance of 17 nations led by Saudi Arabia—has been relieved of his duties and retired. He has been reassigned as an advisor in the Royal Court with the rank of General. Major General Fahd Al-Salman has ...