In the extended preview, Bale's John Miller is seen hiding in the rubble as he tries to evade capture from Japanese troops.
The Flowers of War is directed by Hero and House of Flying Daggers helmer Yimou Zhang.
The war drama, which is based on Geling Yan's novel 13 Flowers of Nanjing, centres on a mortician who poses as a priest in order to lead a group of women in a church to safety during the Japanese invasion of China.
The Flowers of War opens in UK cinemas on August 3. Watch a trailer for the film below: