"Mission Accomplished" is the twelfth and final episode of the third season of the HBO original series, The Wire

The WIRE

the WIRE is the student-run College radio station at the University of Oklahoma, broadcasting in a freeform format. The WIRE serves the University of Oklahoma and surrounding communities, and is staffed by student DJs. The WIRE broadcasts at 1710 kHz AM in Norman, Oklahoma...

. The episode was written by David Simon

David Simon

David Simon is an American author, journalist, and a writer/producer of television series. He worked for the Baltimore Sun City Desk for twelve years. He wrote Homicide: A Year on the Killing Streets and co-wrote The Corner: A Year in the Life of an Inner-City Neighborhood with Ed Burns...

 from a story by David Simon & Ed Burns

Ed Burns

Ed Burns is a producer, screenwriter, and novelist. He has worked closely with writing partner David Simon. They have collaborated on The Corner and The Wire . Burns is a former Baltimore police detective for the Homicide and Narcotics divisions, and a public school teacher...

 and was directed by Ernest Dickerson

Ernest Dickerson

Ernest Roscoe Dickerson A.S.C. is an American film and television director and cinematographer. He directed generally urban films sometimes with supernatural stories like Juice, Tales from the Crypt Presents Demon Knight, Bones and Never Die Alone...

. It originally aired on December 19, 2004.
The title refers to McNulty completing his goal of breaking the Barksdale organization. It also refers to the success of Cutty's attempts at personal reform by starting a new life as a boxing trainer.

The title is also a reference to President George W. Bush

George W. Bush

George Walker Bush is an American politician who served as the 43rd President of the United States, from 2001 to 2009. Before that, he was the 46th Governor of Texas, having served from 1995 to 2000....

 announcing the supposed end of the War in Iraq.