Four Men and a Prayer (1938)

After British officer Colonel Loring Leigh is disgraced and discharged following accusations of issuing an order that caused 90 deaths, he gathers his four sons at their family home. Leigh reveals he was framed by an arms syndicate but is killed before he can share more details. Determined to clear his name, the brothers split up, traveling to South America, India, and Egypt in search of evidence.