What was the only film directed by Frank Sinatra?

The only film directed by Frank Sinatra was None but the Brave.

Released in 1965, the anti-war film follows American Marines and Japanese soldiers stranded together on an uninhabited Pacific island during World War II. Sinatra also produced the film and starred as U.S. Marine lieutenant Blair.

The project was an American-Japanese co-production made with Warner Bros., Sinatra’s Artanis Productions, and Japan’s Tokyo Eiga. Filming began on the Hawaiian island of Kauaʻi in April 1964, with additional studio work completed in California. The film was released in Japan in January 1965 and in the United States the following month.

Some accounts note that Japanese filmmaker Kazuo Inoue directed scenes involving only the Japanese cast, and some sources credit him as a co-director in Japan. Nevertheless, None but the Brave is recognized as Sinatra’s sole directorial effort. The other titles in the options were films in which Sinatra acted, but he did not direct them.