That looks like it was based on a true story from World War II, and was made into a movie called "The Fighting Sullivans". The five
Sullivan brothers joined the Navy after
Pearl Harbor and insisted on being kept together. In their neighborhood growing up they were known as "The fighting Sullivans". They were all killed on the same day, and since then I believe it became law that brothers can't serve together. There was also a ship the USS
Sullivan in their honor. Their mother broke the champagne bottle on it to christen it.
The old black and white movie from about 43 or 44 was a real tear jerker. I dare any one to watch it and not bawl your eyes out at the end.