What does the Pearl Harbor memorial represent?
To the men that died that Sunday morning on Dec. 7, 1941.
A memoir is a historical account usually written from personal experience. There are many memoirs that have been written by people who experienced the Japanese attack at Pearl Harbor. Perhaps you are thinking of "memorial". Pearl Harbor itself is not a memorial, it is a US Naval Shipyard. There are any number of memorials at Pearl Harbor, the most emblematic being that of the USS Arizona.