heroic saga; chivalric romance; biography of a brave fighter
Refers to a narrative or story about brave warriors, often in a historical or literary context.
He is researching medieval heroic sagas.
tale of one's heroism; episode of bravery; acts of violence
Often used for personal accounts of daring deeds, sometimes with a self-aggrandizing or humorous tone. The gloss 'acts of violence' is a less common, extended use.
He started telling tales of his own heroism.
That incident is just one of his episodes of bravery.
冒険談 focuses on adventure stories, not necessarily emphasizing martial valor, whereas 武勇伝 specifically highlights bravery and feats of arms.
Compound of 武勇 (bravery, military prowess) and 伝 (legend, biography). The exact historical derivation is uncertain, but the word follows a common pattern for narrative genres.