(TNND) — The Department of Defense is pulling books from its libraries that address diversity, anti-racism or gender issues, The Associated Press reported Friday.

The AP obtained a Defense Department memo that orders military leaders to identify such books by May 21.

Books “promoting divisive concepts and gender ideology are incompatible with the Department’s core mission,” the memo said, according to the AP.

Defense Secretary Pete Hegseth has previously declared that “DEI is DEAD at DOD,” in line with President Donald Trump’s executive orders targeting diversity, equity, and inclusion programs.

Military academies have already been told to review their books and curriculum for DEI violations.

The U.S. Naval Academy, for example, removed nearly 400 books from its library.

“We are leaving wokeness and weakness behind,” Hegseth told special operations troops this week in Florida. “No more pronouns. No more climate change obsession. No more emergency vaccine mandates. No more dudes in dresses. We're done with that (expletive).”

Efforts to abolish DEI within the Defense Department were also highlighted by officials to mark Trump’s first 100 days in office.

The AP reported that the Defense Department’s efforts to purge DEI-related books have led to the removal of some that address the Holocaust, feminism and civil rights.