After reviewing things 'round here, I'm curious why, under theaters of the war, Why is America not listed? With all of the influence and build up of industry, coastal defense, et al, Why isn't the Continental U.S. listed? Food for thought.
Also I think most of it falls under the European/Atlantic theater. The "Battle of the Atlantic" extended into the Caribbean and even the Gulf of Mexico.
Littoral combat up and down the East coast and Gulf, the Aleutian campaigns, Coastal guns, and that one Japanese sub who shelled an Oregon town and the Captain then returned after the war to present them his sword in apology.
That sounds like two incidents that got mixed up. A plane from a Japanese sub did drop a couple of bombs at least near a town in Oregon and the pilot returned after the war to apologize. Another sub shelled Fort Stevens also in Oregon. A refinery in California was also shelled by a Japanese sub I believe. Then there were the balloon bombs.
The Americas are considered more of a 'Home Front'. The Aleutians would probably fall into the 'Pacific' Category along with Pearl Harbor. I don't think it needs to be called a 'Theatre of War' when very little actual combat took place between opposing forces. A Home-Front forum to discuss the political/economics etc would be suitable but nothing to sweat about.
For the USN, it was the American Theater. For the US Army, there was the Eastern Theater of Operations and the Western Theater of Operations. The ETO became the Eastern Defensive Command in 1942, and lost it's Theater status. Not sure about the WTO. Also, The rest of the US, not along the coasts was called Zone of the Interior, which had originated in WW1.
The Aleutians were in the American Theater. First Special Service Force saw their first action there. American Theater (World War II) - Wikipedia And it has it's own Campaign Medal American Campaign Medal - Wikipedia