I have just finished watching the film 'The Fighting Sullivans', and I must say that I enjoyed it a great deal. It was released in 1944, and was based on the true story of the Sullivan brothers, all of whom fought in World War II (don't want to give away the ending to you, though).
The movie progresses through the various 'stages of life' of the brothers & rest of the family, ranging from the birth of the oldest, George, to their mid to late 20s. Throughout the film the boys maintain a very strong sense of companionship, proving this through various 'dilemmas', ranging from fights with other kids to saving one another from drowning. There are several instances of comedy, though I would classify the film as either a drama, or perhaps even a biographical film.
The cast includes:
Anne Baxter as Katherine Mary Sullivan
Thomas Mitchell as Mr. Thomas F. Sullivan, the father
Selena Royle as Mrs. Alleta Sullivan, the mother
Edward Ryan as Albert Leo Sullivan
Trudy Marshall as Genevieve Sullivan
John Campbell as Francis Henry Sullivan
James Cardwell as George Thomas Sullivan
John Alvin as Madison Abel Sullivan
George Offerman, Jr. as Joesph Eugene Sullivan
Roy Roberts as Father Francis
Ward Bond as Lieutenant Commander Robinson
As you can see, there are a few big names in the film, and even those who were not well known did a very impressive job at portraying the various characters. I thoroughly enjoyed all of their performances.
I don't want to give away any more of the plot than I already have, but I assure you that you will enjoy this film. It's great for everyone, as it really shows how important family is.