Enraged at his friend’s death Odysseus sprang in fury,
helmed in fiery bronze he plowed through the front
and charging the enemy, glaring left and right
he hurled his spear – a glinting brazen streak –
and the Trojans gave ground, scattering back,
panicking there before his whirling shaft –
a direct hit! Odysseus struck Democoon.

– Homer

The Iliad, Book 4, lines 570-576. When his friend Leucus is killed, an enraged Odysseus runs straight to the front lines and kills King Priam’s son Democoon to avenge Leucus’s death. This demonstrates the great fighting skills and heroic courage of Odysseus in the heat of battle.