In The Odyssey, what are the main causes of the troubles that Agamemnon and Menelaus face on their way home from Troy?

To discover the fate of Menelaus after the end of the
Trojan War, we need to look at Book 4 of this epic classic. In this section of the story
Menelaus tells Telemachus how he managed to make it home. He, like other Greeks, found
that his journey homeward was protracted due to the way that his ship was blown off
course. Menelaus found himself stranded in Egypt and is told by Proteus how he can get
back to his home.

As for his brother, Agamemnon, the story
is somewhat different and much more tragic. Ater a voyage that was marked with storms
and tempests, Agamemnon was blown off course and landed in the country of Aegisthus,
whom Clytemnestra (Agamemnon's wife) had taken as a lover. Agamemnon's return resulted
in his slaughter at the hands of his wife or at the hands of her lover, depending on
which account you look at.