Sergeants 3 is a 1962 American comedy/Western film directed by John Sturges and starring Rat Pack icons Frank Sinatra, Dean Martin, Sammy Davis Jr., Peter Lawford and Joey Bishop.

Mike and Chip are determined to prevent Larry from carrying out his decision to leave the army at the end of his current hitch and marry the beautiful Amelia Parent.

Thinking himself discharged, Larry drives off in a buggy with Amelia, but the crafty Mike shows the post's commanding officer the reenlistment paper that he had promised to destroy.

The others were: Ocean's 11 (1960), Robin and the 7 Hoods (1964, with Joey Bishop absent and Bing Crosby replacing Peter Lawford) and 4 for Texas with Frank Sinatra, Dean Martin, Anita Ekberg and Ursula Andress as the four in the title, Charles Bronson as a villain and the Three Stooges as additional comedy relief.

The film had seldom been seen after its initial run in cinemas until a DVD was released on May 13, 2008, both as a single disc and as part of a new Rat Pack box set, to commemorate the 10th anniversary of Sinatra's death.

In a contemporary New York Times review, critic A. H. Weiler wrote: "Mr. Sinatra and his loyal coterie switch from slapstick to slaughter and back again with reckless abandon.