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The sacking of some of the top military chiefs is not the first reshuffle in the country. But it comes as the war in Yemen, where a Saudi-led coalition is fighting rebels, ends its third year.

Crown Prince Mohammed bin Salman, who is heir to the throne and the defence minister, is believed to be behind the various recent shake-ups in the country.

We speak to our Arab Affairs Editor, Sebastian Usher.

(Photo: Crown Prince Mohammed Bin Salman at a press conference in the Saudi capital Riyadh, in April 2016. Credit: Fayez Nureldine/AFP/Getty Images)