Apparently it is based on the Alamo. But this episode suffers from the same defect as the baseball episode: nobody outside the US cares! I hate to break it to Americans, but no one knows or cares about the "legend" of Davy Crockett or the Alamo. The only way the rest of the world knows about it, is because American TV shows keep bringing it up. Worf talking about the "legend" of Davy Crockett is laughable. No Klingons would have heard of it. Hell, you can ask any German, Indian, Norwegian, Japanese or Australian... NO ONE cares or even knows the story.
The B story is about Quark and Ezri. The more the series progress, the more human Quark becomes. He has become the warm hearth of the show.