Babylon 5: A Call to Arms is a 1999 American made-for-television film and the fourth film set in the Babylon 5 universe. It was written by J. Michael Straczynski, directed by Mike Vejar, and originally aired on TNT on January 3, 1999, as one of two films shown over the 1998–1999 season to fill in the gap between the fifth season of Babylon 5 and the spin-off series Crusade.

Babylon 5 is an American space opera television series created by writer and producer J. Michael Straczynski, under the Babylonian Productions label, in association with Straczynski's Synthetic Worlds Ltd. and Warner Bros. Domestic Television. After the successful airing of a test pilot movie on February 22, 1993, Babylon 5: The Gathering, Warner Bros. commissioned the series for production in May 1993 as part of its Prime Time Entertainment Network (PTEN). The show premiered in the US on January 26, 1994, and ran for five 22-episode seasons.