Father Skywalker said:

Ok, now I kinda understand it. ""Star Wars" is another name/word for star wars episode 4-a new hope; being that it was originally intended to be one movie, rather than an entire saga and series, the first one got the nickname "star wars", and just "star wars"......

I know, it's a neat little story, innit? I mean to nickname "Star Wars Episode IV: A New Hope" just "Star Wars"... It's like they didn't know about "The Tragedy Of Darth Vader" back then. And then when "Star Wars Episode V: The Empire Strikes Back" came everyone would be like "WHAAAAAAT...?" because they thought they missed something.

But they didn't, becuz "Episode V: The Empire Strikes Back" is the direct sequel to "Episode IV: A New Hope", if you disregard the EU (Expanded Universe).