What is recognized as the first American feature-length film?

The first American feature-length film is recognized as The Squaw Man, which was released in 1914 and directed by Cecil B. DeMille. This film holds historical significance as it was a pioneering effort in extending the length of films beyond what had been previously prevalent in the industry. Feature-length films typically run for over an hour, which was a departure from early motion pictures that were often short and comprised of simple narratives.

The Squaw Man is notable not just for its length but also for its impact on narrative storytelling and production techniques in cinema. DeMille’s work set a precedent for future feature films, showcasing the potential for deeper character development and more complex storylines than what was possible in shorter films. The film's success contributed to the establishment of film as a serious art form and a viable means of entertainment.

In contrast, while other options like The Great Train Robbery did contribute significantly to early cinema and are often recognized for their influence, they do not carry the same distinction as the first feature-length film. Broken Blossoms and The Sneeze also represent important moments in film history but do not qualify as the first feature-length work.