Trojan were to return Helen and other valuables to the Greeks
I want to go home, with King Menlous
Athena
But, the goddesses Athena and Hera decided to help the Greeks so they devised a plan to trick the Greeks into thinking that the Trojans had broken their promise and were attacking the Greeks again
Hera
Athena disguised herself as a son of King Priam of Troy
King Priam
Backstabbing Menelaus by killing him with an arrow (This is his thought)
Thank you for saving me
Athena protected Menelaus from death
No
The shooting of that arrow reignited the battle between the Greeks and the Trojans