But if you're just trying to find information about the Battle of Bull Run, you're probably out of luck when it comes to just simply looking around and stumbling across what you need. The answer is knowing how to use search engines and subject indexes effectively.
Every site is under a main heading and multiple subheadings.
This is very helpful if you know exactly what you're looking for and where to start looking. For example, in looking for the Battle of Bull Run might start under Arts and go down through successive layers of Humanities, History, U.S. History and then to Wars. It comes in handy when you are looking for information for our Bull Run example, since there are several categories in the U.S. History grouping, like 19th Century and Regional History, that could also contain information about Bull Run. For example, once you've gotten to the U.S. History, you can narrow your search for information to just that section. But if you want to do some serious data-mining you simply can't beat a search engine.