After enduring WWII-era brutalization by Hitler's Nazi Party and decades of repressive Soviet dictatorship, the tiny Eastern European nation of Estonia began to declare its independence from Communist rule in the late '80s. Over a five-year period, beginning in 1986, hundreds of thousands of Estonians began to systematically and repeatedly gather in public venues to collectively sing illegal patriotic songs, declaring their desire for national independence but never resorting to violence amid their protests. It was no coincidence that Estonia subsequently became one of the first nations to break away from the Soviet Union in the events leading up to the fall of the Iron Curtain. The documentary The Singing Revolution chronicles this extraordinary yet seldom-told chain of events.