Hello, I just signed up here because I've been doing research on my family history and have been trying to locate my grandpa's unit from WWII. His papers say Battery A 342d AAA Searchlight Battalion. (American Theater) He served in the Panama Canal and in Puerto Rico. His name is Carlos Cerra Montilla. I cannot seem to find anything out there on this unit and need some help. I know that a group picture exists because my grandpa used to have a few of those long rolled out ones the military would issue or sell, but they were misplaced. Any information anyone can give me or if anyone's family member served with him, I would love to know and would be greatly appreciated. Thank you.