Equestrian History (Maybe?) · 6:22pm
A crazy world building idea that came to me.
In the time between Nightmare Moon's rebellion and the modern day, there was a great war between the pony races and the canine races. The canine races, while winning some victories, were rapidly losing the war, because - to be blunt - Celestia controlled the sun and moon, pegasi controlled the weather, and the unicorns were casting rather devastating war magic. However, the caning leaders were too stubborn to yield.
Then, one particular dog realized the war would eventually destroy the canid races, so he formed a gathering to preach peace to his brethren so as to end the war. He used the pony techniques of music and choreography to give the message more weight. He called this gathering Woofstock.
The message was taking hold. The music, choreography, and fireworks was nudging the canid races towards peace. Then the fireworks drew a contingent of Earth Pony soldiers, who didn't recognize it as a peaceful gathering.
After the disaster of Woofstock, the wars came to an end, the canid races capitulated, and Celestia disbanded a good portion of the army so that the only soldiers who had powerful weapons were of high enough training to recognize the difference between a threat and a musical in the making.
The Woofstock founder's pack, however, swore eternal vengeance against the ponies for their Alpha's unwarranted death. In honor of their Alpha's death, they swore to undermine and destroy Equestria, and to never rest until the ponies had paid for their crimes, swearing eternal hatred on Equestria and Celestia.
In honor of their fallen leader David Bowwowie, they named themselves the Diamond Dogs.