English: For those not as familiar with military and space history, the Delta symbol used by the U.S. Space Force and Space Operations Command can be the subject of misconceptions and confusion with pop culture references. But in reality, the Delta symbol traces its origins all the way back to the Greek alphabet. Here, the evolution of the Delta is traced from those ancient beginnings, through the development of rocketry the space race of the 20th Century, all the way to the present day with the founding of the sixth branch of the American armed forces. (U.S. Space Force video by Dave Grim)