Tank 432 (originally Belly of the Bulldog[3]) is a 2015 British psychological horror film written and directed by Nick Gillespie.

Rupert Evans, Deirdre Mullins, Steve Garry, Michael Smiley, April Pearson, and Gordon Kennedy, Tom Meeten, and Alex March star.

Evans, Mullins, Garry, Smiley, Kennedy, Meeten portray mercenaries tasked with transporting a hostage (Pearson) and survivor (March) across a battlefield.

In a forest, mercenaries Reeves and Karlsson rejoin the rest of their squad – Gantz, Capper, Evans, commanding officer Smith, along with two hooded and bound captives.

Annabella, the surviving prisoner, claims to be a teacher and explains it means "strength and power" in ancient Greek.

Karlsson begins looking through files stored in the vehicle, and finds they are dossiers on the mercenaries and their captives, identifying them as dead, including Smith.

The forest from the start is shown again, as a loudspeaker announces that an experiment is about to begin, and a soldier emerges from a white box.

Writer-director Nick Gillespie had collaborated with executive producer Ben Wheatley on several films previously, including Kill List.

Of the film's plot, Gillespie said it was designed to allow viewers to come to their own conclusions, as he found it more interesting to offer clues than direct answers.

Scheck further described it as "an occasionally intriguing but frustratingly oblique high-concept genre exercise that mainly induces tedium, not to mention claustrophobia".

[10] Writing in Film Journal International, Maitland McDonagh called it a "claustrophobic thriller with a disappointing payoff".

[11] Ben Kenigsberg of The New York Times called it a "high concept tease" with an unsatisfying conclusion and plot possibly kept vague to hide its lack of originality.

Murray concluded, "A few memorable shots don't offer enough justification to watch a film that's not scary, rarely exciting and never as engrossing a puzzle as it means to be.

"[13] Chuck Wilson of The Village Voice compared the plot negatively to The Outer Limits, calling the film a "busy but tedious thriller".

[14] In rating it 3/5 stars, Drew Tinnin of Dread Central praised the cinematography and acting but said answers to the film's plot come too late and are not satisfying.