What is the recent behind the bitcoin fork?

Bitcoin Civil War!

We know there was a hard fork in the bitcoin industry which has split up the bitcoin in to two namely bitcoin cash, and BTC. But what was the reason behind the bitcoin fork? This is the question which runs in every bitcoin user's mind. Initially there was a disagreement between the bitcoin core developers and bitcoin miners. They have quarrel for the cryptocurrency's featrue.  In one side the core bitcoin developers claimed to decrease the bitcoin block size in order to prevent hacks, but in another hand, bitcoin miners claimed to increase the block size for increasing the network spee. Finally the quarrel has been end up with a civil war  called
 " bitcoin fork".  

And the war has been ended up with a rise of new cryptocurrency called bitcoin cash!

What is bitcoin cash?