Donald Trump delivered the commencement address at the Naval Academy on Friday, and it didn’t come without controversy.

In his speech, the 45th president told the crowd of Navy graduates that “our ancestors tamed a continent.”

He continued on, saying, “we are not going to apologize for America. We know the truth, will speak the truth, and defend that truth. America is the greatest fighting force for peace, justice, and freedom in the history of the world.”

With what seems to be a very limited understanding of  American history, Trump has proven to be continuously offensive — especially regarding Native American history. Coincidentally, Trump has often praised and compared his presidency to that of former President Andrew Jackson. Jackson is most known for signing the Indian Removal Act into legislation. The law resulted in the genocide of Native Americans by forcing them to move to lands west of the Mississippi River.

Trump also hosted an event to honor Native Americans all while an image of Andrew Jackson hung behind his guests. During the event, Trump took a jab at Massachusetts Senator Elizabeth Warren by referring to her as “Pocahontas” because of her claims of having Native American ancestry.

Twitter fired back at the President for his racially insensitive comments, but there’s no telling if he’ll ever learn.