National Lampoon's Vacation is a vintage comedy franchise beginning in the 1980s, though the lack of numerals makes it tricky to know which order to view them in. Chevy Chase is a comedy icon, which was clear from his appearances on the first season of Saturday Night Live. Chase would go on to a string of movie hits, including Foul Play, Caddyshack and Fletch. Unfortunately, Chase also has a reputation for being difficult to work with, so after a string of movie duds in the '90s like John Carpenter's Memoirs of an Invisible Man, he was largely relegated to supporting roles or cameos.

https://screenrant.com/vacation-movies-in-order/