A friend of Achilles was pretending to be him, and Hector killed him. Hector then striped him of his armor and saw that is was not Achilles. But he left the mans body laying there and took the armor.
Once he found out, that his friend was killed by Hector, he wanted revenge. He also was sad because he loses his armor. Shortly after he found out he was killed his other friends brought him the body.
They were ready to attack. But before they did, Hector wanted a deal. He wanted it to be, if he died then Achilles could have his armor but had to leave his body in peace. and if Achilles died it would be the same for him.
Achilles did not accept the deal that Hector was presenting to him. Achilles wanted full revenge for his friends death. Then they charged at each other, The war was going on for about 5 minutes, then finally Achilles ended the short war.
Next achilles tied up Hector's feet to the back of his chariot and drove around. He drove around the wall 3 times, wall everyone else was throwing stuff at Hector. Shortly after Hector's dad wanted Hector's body.
Achilles wanted to say no, but had to say yes. This was because one of the gods made him give Hector's body to his dad so that Hector could have a proper burial. There was no war allowed wall Hector's burial was going on.