The choice of Reuben James as the name of Denzel Washington's character is surely not a coincidence.
In 1804, during the Barbary Wars, US Sailor Reuben James, positioned himself between his captain, Stephen Decatur, and a pirate; taking the sword blows directed at Decatur.
In October, 1941, before the US entered WW2, the first USS Reuben James, a destroyer on convoy duty in the North Atlantic, positioned herself between an ammunition ship and the known location of a German U-Boat. Struck by a torpedo which ignited her magazine, the Reuben James sank in five minutes. Two thirds of her crew perished. Woody Guthrie wrote a song "The Sinking of the Reuben James".
Denzel Washington's character, Reuben James, likewise, positions himself in harm's way to protect others. ,