The Inchon invasion, a pivotal event of the Korean War, is widely considered one of the most daring and successful maneuvers in modern warfare -- and may have been on the minds of Paramount Pictures executives when they announced Wednesday that they will build a $1-billion campus of movie studios, a theme park, hotel, water park, and shopping malls in Inchon, south of the capital city of Seoul. The complex, a joint venture with Daewoo Motor Sales Corp., will become the first of its kind in South Korea involving an American entertainment company.