Which documentary highlighted the impact of the Vietnam War and revolutionary changes in documentary filmmaking?

The documentary that highlighted the impact of the Vietnam War and revolutionary changes in documentary filmmaking is "Hearts and Minds." This film, directed by Peter Davis, was released in 1974 and provides a critical examination of the Vietnam War, exploring its effects not only on soldiers and civilians in Vietnam but also on American society. It incorporates powerful interviews and stark visuals, capturing the emotional and political turmoil of the era.

"Hearts and Minds" is significant not only for its subject matter but also for its innovative approach to documentary filmmaking. It broke away from traditional styles by using a mix of archive footage, personal interviews, and dramatic reenactments to convey its message, helping to shape future documentary techniques and narratives. The film has been recognized for its ability to provoke thought and conversation about the war, challenging viewers' perceptions and encouraging a more profound engagement with the complexities of the Vietnam conflict and its repercussions.

In contrast, the other documentaries mentioned each focus on different themes and issues. "Bowling for Columbine" delves into gun violence in America, "Supersize Me" examines fast food culture, and "March of the Penguins" chronicles the life cycle of emperor penguins, thus lacking the direct connection to the Vietnam War and its larger