Saudi Arabia's King Salman has ordered a major shakeup of his top military brass amid the country's ever-worsening intervention in neighboring Yemen.

The surprise move, reported by the official Saudi Press Agency (SPA), is the latest overhaul of Saudi institutions assumed to be led by Crown Prince Mohammad bin Salman. They have become a hallmark of his father's three-year reign.

The monarchy sacked the military chief of staff, Gen. Abdul Rahman bin Saleh al-Bunyan, as well as the heads of the ground and air defenses.

The decrees were announced in a series of short dispatches from the SPA.

The Guardian reports: "Crown Prince Mohammed bin Salman, the heir to the throne and the son of the monarch, is the country's [defense] minister and has been consolidating his grip on power in recent months."

In January, we reported that eleven Saudi princes had been arrested after protesting their utility bills after a royal decree ended the kingdom's long-standing policy to cover them.

And, in December, NPR's Jackie Northam reported that Saudi Banks were feeling the pinch from round ups of dozens of businessmen, ministers and princes as part of an anti-corruption drive.

Prince Faisal bin Farhan, a senior adviser at the Saudi Embassy in Washington, tweeted on Monday that the move was part of a "multi year effort" to overhaul the Defense Ministry that "encompasses all elements of the ministry including organization, force structure & long term procurement."

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