I want to know the answer to the following question:
When was the Battle of Gaza?
All the background I'm provided with is that "Ptolemy invaded Syria and defeated Antigonus' son, Demetrius Poliorcetes, in the Battle of Gaza of 312 BC which allowed Seleucus to secure control of Babylonia, and the eastern satrapies.". Is that enough to answer the question?
Answer: yes