The most important scene of the Iliad is not about war, but about mercy.
King Priam, father of Hektor, sneaked into the Greek camp and into Achilles' tent. He asked Achilles for mercy in the most compassionate words:
‘Honor then the gods, Achilles, and take pity upon me remembering your father, yet I am still more pitiful; I have gone through what no other mortal on earth has gone through; I put my lips to the hands of the man who has killed my children.’
This finally cooled the anger in Achilles' heart and he allowed Priam to take back Hektor's body for burial.
"The Great World History Book"