The internet's latest viral video is actually more than 70 years old — and as relevant as ever.

In 1947, the U.S. War Department (which later became the Department of Defense) released this 17-minute short film, "Don't Be a Sucker," into theaters around the country. Still reeling from the recent end of  World War II, the military put together a video with a strong message about fighting the spread of fascism in America.

The film found a new, modern audience when Michael Oman-Reagan tweeted a portion of it to his nearly 25,000 followers after a crowd of torch-wielding white supremacists marched on Charlottesville, Virginia.