So why exactly did the Dragonguard come all the way to Tamriel in search of a Dragonborn and exterminate dragons? The Tsaesci invasion back then was apparently fueled for this end, or at least that is why they chose to swear fealty to Emperor Reman and remained a dominant faction until the Interregnum. According to Arngeir, the Dragonguard carried out a campaign of genocide against dragons in those days, and the Blades want to do resume that again. My question is: why were they carrying ethnic purges on the dov, even invading from across the ocean to do so? And why were they seeking a Dragonborn?