WATCH: Gen. John Allen Endorses Clinton at DNC Over Protest Chants of 'No More War!'

Retired general John Allen was forced to take several pauses as many in the auditorium chanted 'U.S.A.!' in an attempt to drown out Bernie Sanders protesters chanting down war.

Bernie Sanders supporters were still making their voices heard on the last night of the Democratic National Convention in Philadelphia on Thursday, as protesters chanted "No more war!" while retired general John Allen endorsed Hillary Clinton.

Allen was formerly a four-star general and President Barack Obama's special envoy to the global coalition against ISIS. As he addressed the convention, dozens of military veterans stood behind him on stage.

"This election can carry us to a future of unity and hope or to a dark place of discord and fear," said Allen. 

"We must choose hope. Every American in uniform, in the White House or at home..." Allen trailed off as the chanting grew louder before joining in with a counter-chant of "U.S.A.! U.S.A!"

Allen continued: "We must be a force for unity in America, for a vision that includes all of us."