The Centers for Disease Control and Prevention (CDC) is set to lose nearly 1,300 probationary employees—about 10% of its workforce—as part of a broader federal decision to remove all probationary employees from the agency.

The Pentagon said on Friday it would start firing about 5,400 civilian employees who were on probation, the first moves by President Donald Trump's administration at the department to make good on its promise to reduce the federal workforce.