
There are probably not many restaurants in the world named after a battalion of the U.S. Army. “Decimo Porto” is exactly 10th Port, which was, in the last war, a unit of the 7th Sustainment Brigade.
On September 1, 1944, the 10th Port deployed to the heavily damaged port at Leghorn, Italy, where the unit continued to support U.S. Fifth Army. On November 25, 1945, the 10th Port assumed responsibility for port operations at both Naples and Leghorn. Although the war in Europe ended on May 8, 1945, the 10th Battalion still had to run the ports while units departed the continent. It was finally inactivated on January 31, 1947.
(U.S. Army Sea Tales by Walter L. Grey Jr.)
“Decimo Porto” (10th Port), at the time and after the war, became another name for Livorno.