Is the invasion of Normandy the largest amphibious operation?

I'm sure the largest amphibious invasion was D-day on June 6, 1944. But some guys on Youtube have been telling me it's the invasion of Okinawa. I doubt it, but I just want to make sure. There were 175,000 Allied soldiers that invaded Normandy, and over 24,000 paratroopers that dropped in the night before. I'm not sure how many invaded Okinawa, but I know that the only allied country was the U.S. that had anything to do with it. When the Americans, British, and Canadians were involved in D-day. But it's kind of common sense, right? I mean, of course more soldiers invaded fortress Europe to bring the downfall of Nazi tyranny than to invade a tiny island off the coast of Japan right?