Donald Trump’s administration has detained dozens of parents and spouses of active-duty U.S. troops as it rolls back immigration protections for military families to pursue its mass deportation agenda, an Associated Press investigation found.

More than 50 parents and spouses of active-duty service members have been detained since Trump took office for a second term, and at least six have been deported, the AP found in the first accounting of such detentions, which the government does not track. At least eight immediate family members of U.S. service members remain in federal immigration custody.

Parents and spouses of people in the military have generally been shielded from deportation under bipartisan consensus for decades. But the AP found they’re now routinely being detained for months as they try to adjust their legal status through the policies available to service members’ close relatives and even as the military continues to recruit by advertising immigration benefits for enlistees’ families. Experts warn that the reversal could undermine military preparedness even as the U.S. is at war in Iran. It’s left military members without emotional support and caretakers for their children, delayed deployments and forced some to take leave.