|A brief history of the German language||You probably aren't going to find something better than this online.|
|Interaction of gender and declension in Germanic languages||A piece of scholarship on the contemporary languages, but interesting nonetheless.|
|History of the Teutonic Knights||As I recall, these guys were unbelievably tough in the computer game Age of Empires.|
|History of Germany||Might as well start from the beginning, right?|
Recommendations coming soon!