Former Secretary of Defense Mark Esper, says that former president Trump proposed a number of “outlandish” foreign policy proposals while he was in the White House.

According to Esper’s upcoming memoir, in 2019 shortly after being tapped to lead the Pentagon, Trump was reportedly fixated on issues within NATO and corruption in Ukraine despite the national security and foreign policy team trying to tamp down Trump’s concerns because they weren’t considered top concerns at the time.

According to reports from The Hill:

Trump also said he wanted a “complete withdrawal” of forces from South Korea and that he wished to “bring our people home” from embassies in Africa, according to Esper.

“None of this was in our nation’s interests, and as I calmly responded with facts, data and arguments, I saw some irritation in him — I was the ‘new guy’ pushing back,” Esper wrote. “I knew right then and there that this job would be far more challenging than I had anticipated, to say the least.”

The excerpt comes as Esper’s book, “A Sacred Oath: Memoirs of a Secretary of Defense During Extraordinary Times,” offers a number of bombshell allegations against Trump, including that the former president proposed launching missiles into Mexico to strike drug labs run by the cartels.

“He was a lightweight and figurehead, and I realized it very early on,” Trump said in a reaction to Esper’s claims.

Esper has also accused Trump of threatening to deploy 10,000 active duty troops to Washington, D.C., to quell protests in the June 2020, which Esper claimed he blocked. Trump has denied Esper blocked him from doing anything.

Esper served as secretary of Defense from 2019 to November 2020 when President Trump fired him.