I remember during my initial interview I mentioned I wasn’t sure I’d captured all the “countries” I have visited. Back then we’d been cruising a lot in the Caribbean and the islands down there are a mix of independent countries and territories/protectorates of other countries. The CBP agent was okay with that and said he could tell by the list we’d cruised extensively. Now more recently we’ve cruised and visited countries like Egypt, Jordan, Oman, and UAE and I think leaving one of those off could be an issue.