I came across this article rather randomly, after adding a Good Article to the GA page. Looking over the talkpage, it seems like there are a number of other editors who believe this to be well written but ultimately full or WP:Original Research, thereby failing (amongst others) Point 2c, 3a and 3b. Firstly, whilst there is a significant amount of academic research on this subject, it certainly doesn't stop at the Battle of Vienna, and probably hasn't for a hundred years or more. The Battle of Normandy is one example that could be highlighted, and there are probably a number of others; I'm sure the 18th and 19th centuries alone can account for numerous other battles. I think that's the main reason why this should be delisted - copious amounts of OR, even to the extent of declaring in the lead that there were only eight such battles to ever affect Europe in this manner. Further details can be found on the talkpage for other possible examples of OR - I'm afraid this isn't quite my area of expertise, but I think I know enough to see why this shouldn't be a GA.
I came across this article rather randomly, after adding a Good Article to the GA page. Looking over the talkpage, it seems like there are a number of other editors who believe this to be well written but ultimately full or WP:Original Research, thereby failing (amongst others) Point 2c, 3a and 3b. Firstly, whilst there is a significant amount of academic research on this subject, it certainly doesn't stop at the Battle of Vienna, and probably hasn't for a hundred years or more. The Battle of Normandy is one example that could be highlighted, and there are probably a number of others; I'm sure the 18th and 19th centuries alone can account for numerous other battles. I think that's the main reason why this should be delisted - copious amounts of OR, even to the extent of declaring in the lead that there were only eight such battles to ever affect Europe in this manner. Further details can be found on the talkpage for other possible examples of OR - I'm afraid this isn't quite my area of expertise, but I think I know enough to see why this shouldn't be a GA.