Former Defense Secretary James Mattis said Thursday the Jan. 6 assault on the Capitol was “fomented” by former President Donald Trump, and exemplified the “internal threats” faced by the U.S. that should be viewed “with every bit as much gravity as the external problems, and perhaps more so.”

Speaking during an online event, Mattis walked through a list of national security threats such as North Korea, Russia, China and international terrorism, but then turned his attention to the U.S.

“There are also internal threats right now,” he said, citing “the lack of unity on the consensual underpinnings of our democracy, and what we saw on Jan. 6, fomented by a sitting president.”

But Mattis also identified globalism as a root cause of the divisions that led to the pro-Trump mob’s attack on Jan. 6.