President Donald Trump ordered another 2,000 National Guard troops to Los Angeles, bringing the total number of deployed military forces to around 4,700 after 700 Marines were deployed earlier Monday.

Trump’s federalization of the National Guard may still face court challenges, legal experts say, but his Saturday night order is rare.

The Marines are expected to arrive within 24 hours, a defense official said Monday, speaking on the condition of anonymity to discuss ongoing operations.