What pact did the big three Greek gods make after World War 2?

Answer 1

Unfortunately, this question makes no sense. There were no Greek gods associated with World War II. There hasn't been a tradition about any Greek gods since well before the middle ages, a couple millennia ago; WWII, on the hand, happened in modernity, less than 6 decades ago.

The "Big Three," in reference to Greek gods, means Zeus, Poseidon, and Hades. They have nothing at all to do with WWII.

In reference to WWII, the "Big Three" means the UK, USSR, and US. They made a pact during the war, along with China and many smaller Allied nations, to unite against the Axis powers of Germany, Japan, and Italy. The Allied powers came to be known as the United Nations. The UN Charter was signed while the war was still ongoing, but it wasn't ratified until after the war ended -- this may be the "pact" to which this question refers.