Ok, here's what I heard...
The Knights, Rooks and Bishops all lived together in perfect harmony,
until one day, there was a tornado that whipped through Bishopland destroying everything in its path. Picking up all of the Bish flocks of sheep (which were being bred for purposes better left unspoken) as it went. These poor helpless sheep were whipped about within the hurtling vortex (mbaaa) whilst it made its way into peaceful Knightland, where they were gently dropped onto the ground.
Once the raging storm had ended, the Knights came out of their shelters and were surprised to see sheep roaming throughout Knightland (well the fact that the sheep were there was less surprising than what the sheep were wearing), but the Knights soon learned as the Bishops already knew, "sheep r good".
Soon the Bishops learned of this horrible tragedy that had befallen them.
"Oh, where have our dear sheep gone?" they cried.
They asked the Rooks if they knew anything,
"No we haven't seen your sheep you sick bastages" the Rooks said.
So they traveled to Knightland to see if they knew, but the KNIGHTS heard that the BISHOPS were coming and hid the sheep before they arrived. Thus the BISHOPS went home broken hearted to their homes in Bishopland, which were not as "homey" as they once were.
Days turned into weeks, the BISHOPS had to find something to do, but what could they do without their beloved sheep? The KNIGHTS soon became as twisted and evil as the BISHOPS once were, and the ROOKS, being benevolent and wise, continued to ponder the mysteries of the universe.
But soon, the KNIGHTS made a fatal mistake, they became careless and lazy. They would "play" with the sheep in daylight, and close to the borders. It was only a matter of time until Bishopland would find out, and find out they did. Bishopland demanded that the sheep be returned, but the KNIGHTS wouldn't listen. Bishopland called on the wise ROOKS for help, and the ROOKS agreed.
"This is what you must do KNIGHTS", said the ROOKS, "Remove half of the flock back to Bishopland"
The KNIGHTS would not agree, but were frightened of mighty Rookland and to appease the great ROOKS they gave them a gift of one flock. Many of the ROOKS did not want them, but a small faction won out. They wanted to use the sheep for wool and mutton, but soon the ROOKS learned as well that "sheep r good".
Bishopland learned of this and it angered them greatly.
"Why should the KNIGHTS and ROOKS be allowed to keep our sheep!" they screamed.
"We must get them back at any cost!"
Bishopland then invaded Knightland and Rookland without warning, cries of "Sheep r good!"
rose from their throats. Knightland and Rookland immediately declared war on Bishopland and began to drive them out. But Knightland, seeing this as an opportunity to gain the vast knowledge Rookland possessed, turned on their allies.
And so it continues to this day, a horrible endless war....
over sheep
At least that's what I heard....
(From an unknown author of yesteryear)