He is a regular Trojan. A fine fellow, with good courage and plenty of spirit; what the French call a brave homme. The Trojans in Homer's Iliad and Virgil's Æneid are described as truthful, brave, patriotic, and confiding.
“There they say right, and like true Trojans.”
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Trojan from Infoplease: