ARMY SOS CREAMED GROUND BEEF - In the Army, this ground beef dish flavored with Worcestershire sauce is traditionally served on toast, but it also goes well over egg noodles. Add sauteed onions, mushrooms, or bell peppers to vary the taste.
Sos -- "stuff" on a Shingle
After being wounded in Italy in 1944, my grandfather returned home and improvised a dish he was often served in the military. The Army called it Chipped Beef on Toast. The soldiers called it Something (I cant mention here) On a Shingle, and in classic military tradition, that name was reduced to SOS. My grandfather taught this recipe to my dad, who, in turn, also taught it to my mother and me. My mother, who is offended by the idea of having the first S of SOS on her table, calls it Cream...
Army SOS Creamed Ground Beef Recipe - Allrecipes.com