“Awww… I already know Equestrian history, Sunburst! From the Tale of the Two sisters to the Era of Friendship and Harmony! I don’t need another reminder…”  
-Flurry Heart
 
“That is true, I guess. However… There is quite a story that runs deep into the most obscure pages of our thousand year history with the two sisters. A period that predates the Prophecy of the Mare on the Moon, as well as Princess Luna’s banishment.”  
-Sunburst
 
Flurry Heart turns to Sunburst asking, “Really?”
 
“To start with… Lets just say that the Royal Canterlot Voice wasn’t always used to address grand parties and other royal festivities.” Sunburst chuckled. Then a sudden shift in tone became prominent as he continued, “It was the voice that commanded armies…”