A Diomedean compulsion

Explanation

of those who do something under necessity. Aristophanes mentions it in the Frogs. For when Diomedes and Odysseus, having taken the Palladium, were carrying it to the ships, Odysseus, wishing the glory to be his alone, set about murdering Diomedes as he led the way with the Palladium. Diomedes, foreseeing it as the sword glittered like a mirror, seized him, bound his hands, and beat him along with the flat of his sword as he followed.