Question: Which film has the director who is older than the other, But Not In Vain or The Beast Of Babylon Against The Son Of Hercules? 

Venus Against the Son of Hercules
Venus Against the Son of Hercules( also known as Mars, God of War and The Son of Hercules vs. Venus) is a 1962 Italian peplum film written and directed by Marcello Baldi and starring Roger Browne and Jackie Lane.
The Beast of Yucca Flats
The Beast of Yucca Flats( released to television as Atomic Monster: The Beast of Yucca Flats) is a 1961 B-movie horror film written and directed by Coleman Francis.
It was produced by Anthony Cardoza, Roland Morin and Jim Oliphant.
The film stars Swedish former wrestler Tor Johnson as" the Beast".
It starred Anthony Cardoza, Coleman Francis and Jim Oliphant in bit parts, as well as Conrad Brooks in a very small role.
Director Francis cast his two sons( Ronald and Alan Francis) in the film as the two lost boys.
The plot concerns a Soviet scientist named Joseph Jaworsky( Tor Johnson), who defects and flees to a Nevada Test Site called Yucca Flats, only to be turned into a mindless monster by atomic radiation, stalking the desert.
The film has very little dialogue and most of the speech is done by omniscient narration.
Some critics have characterized the film as one of the worst science fiction horror films made, and one of the all- time worst films of any kind, even suggesting that it may be worse than Ed Wood's legendarily bad" Plan 9 from Outer Space".
In 1995, the television comedy series" Mystery Science Theater 3000" featured" The Beast of Yucca Flats", helping the film develop a cult status.
But Not in Vain
But Not in Vain( Dutch name" Niet Tevergeefs") is a 1948 Anglo- Dutch World War II drama, directed by Edmond T. Gréville and starring Raymond Lovell.
The film is set in 1944 in the occupied Netherlands, and was shot at the Cinetone Studios in Amsterdam, with exterior filming taking place at locations in and around the city.
The film also incorporates authentic wartime footage filmed by members of the Dutch Resistance.
The Dutch version of the film was the first Dutch production of a feature film after World War II.
Siro Marcellini
Siro Marcellini( born 16 September 1921) is an Italian director and screenwriter.
Born in Genzano di Roma, Marcellini started his career as a theater director before moving to films, where he first worked as an assistant director.
He directed eleven films between 1953 and 1970, also writing the screenplays for several of them.
The Beast of Babylon Against the Son of Hercules
The Beast of Babylon Against the Son of Hercules( also known as" Heroes of Babylon Hero of Babylon" and" Goliath, King of Slaves") is a 1963 Italian- French peplum film written and directed by Siro Marcellini and starring Gordon Scott.
Ulysses Against the Son of Hercules
Ulysses Against the Son of Hercules is a 1962" peplum" film directed by Mario Caiano.
Edmond T. Gréville
Edmond T. Gréville( real name Edmond Gréville Thonger, 20 June 1906 Nice – 26 May 1966, Nice) was a French film director and screenwriter.
He was married to the actress Vanda Gréville.
Devil of the Desert Against the Son of Hercules
Devil of the Desert Against the Son of Hercules is a 1964 international co-production filmed in Algeria and directed by Antonio Margheriti.
The Beast (1988 film)
The Beast( also known as The Beast of War) is a 1988 American war film directed by Kevin Reynolds and written by William Mastrosimone, based on his play" Nanawatai".
The film follows the crew of a Soviet T- 55 tank who became lost during the Soviet invasion of Afghanistan.
The film has enjoyed a cult- favorite status in spite of its low box office statistics.
Fire Monsters Against the Son of Hercules
Fire Monsters Against the Son of Hercules  is a 1962 film directed by Guido Malatesta that was filmed in Yugoslavia and Italy.

Answer: But Not In Vain