WATCH: General Mattis Jabs Trump: He Got His ‘Spurs In A Letter,’ I Got Mine ‘On The Battlefield’

Former Secretary of Defense Gen. James Mattis took a few a shots at President Donald Trump while giving a keynote address on Thursday night.

Speaking at the annual Alfred E. Smith Memorial Foundation Dinner, Mattis joked about Trump reportedly calling him “the world’s most overrated general,” and jabbed the president for receiving a draft deferment during the Vietnam War after being diagnosed with bone spurs in his heels.