Answer Every day we face challenges and it's what we do with these challenges that makes what we are in live. What my greatest challenge these days is getting up with a slipped disk in my back, sore...
His Greatest Challenge was to get his place as a God again
war, slavery, and more
At a guess, assuming you mean challenges involving getting, preparing and cooking food, under the ocean; in the desert; in the Arctic and Antarctic.
Overcoming historical racism, sexism, and homophobia. War is problematic to a religion that prohibits killing.