The crossword solution for the term 'Italian Seaport, WWII Battle Site' is Salerno, which has seven letters. Salerno is a city located in southwestern Italy on the Gulf of Salerno, and it was the site of a major battle during World War II. The Battle of Salerno, also known as Operation Avalanche, was fought between Allied forces and German forces in September 1943. It was one of the first Allied invasions of mainland Europe and resulted in a victory for the Allies.