CHARLESTON, S.C. — Some cadets at The Citadel will now be required to get vaccinated to guard against COVID-19.

The policy comes after a memo was issued this week by the U.S. Department of Defense, WCSC-TV reported.

The ROTC detachments at the college will be required to get vaccinated, according to The Citadel. Those detachments make up about 400 cadets school officials said.

About 68% of cadets are vaccinated against the coronavirus, The Citadel said.