Robotech II: The Sentinels is a 1988 American-Japanese animated film written and directed by Carl Macek. Part of the Robotech franchise, it is set between the events of The Macross Saga and The Masters from the original 1985 television series. The film follows Rick Hunter, now a major general, as he leads Earth's forces aboard a new space station on a diplomatic mission to the Robotech Masters, unaware that the Masters have come under attack from the Invid.

The Sentinels was intended by Harmony Gold as a new television series that would feature characters and elements from all three Robotech sagas. Unlike the original series, which was created from footage of existing anime, The Sentinels mostly uses original animation. Only three of the planned 65 episodes were animated before the project was canceled in 1986 due to a lack of funding. Macek turned the existing footage into a film, which was released to home media. The unfinished source material received several different adaptations that provided alternate continuations of the story.