Question: Did they use atomic bomb in Chinese Civil War?, Answer:Yes, Description of Chinese Civil War: Series of conflicts within China, 1927 – circa 1950, Fact1: The first of China's nuclear weapons tests took place in 1964., Fact2: Chinese Civil War were before 1964.
Step1: When was the Chinese Civil War?, Step2: When did China first test nuclear weapons?, Step3: Did #1 occur after #2?, Wikipedia page for step 1: Chinese Civil War, Wikipedia page for step 2: Chinese nuclear weapons, Wikipedia page for step 3: , not_definitive_answer: False, incorrect_answer: True