All the Brothers Were Valiant is a 1923 American silent sea adventure and romantic drama film starring Lon Chaney.

[4] Chaney disliked his co-stars on this film, calling Malcolm McGregor a "dumb bell" and saying of Billie Dove "she's all beauty and no brains".

Mark Shore (Lon Chaney), the elder brother of Joel (McGregor), was captain of a whaling schooner called the "Nathan Ross", but when his ship returned to port from a trip to the Gilbert Islands, he was no longer aboard.

While his family history shows that all of their men-folk were brave and courageous, Priscilla thinks that her husband is really a coward at heart.

Priscilla rapidly gets bored with sailing, and the smell of cooking whale blubber makes her sick to her stomach.

Joel finds his brother Mark who suddenly hops aboard the ship one night as it rounds Cape Horn.

Aaron Burnham, the ship's carpenter, remains loyal to Joel and manages to release him from captivity.

Mark realizes his mistake and tries to call off the mutiny, but in the melee, he is hit on the head and falls into the sea.

It is an attraction that will be enthusiastically received by men, and because of its romantic interest will appeal to many women...Lon Chaney gives the most striking performance of the production.