There was no attack, there was no preparation for something it was simply an economic thing
- Bitcoin reward dipped and reward was much lower than BCH 4.5 cents vs 5.6 cents on average
- Bitcoin was about to adjust difficulty BCH was not
- Phoenix pointed around 4exahash against it, not 10, that's not confined by block time and it did so until the reward per th/s adjusted, it actually dropped to 3 cents at the end (but because of faster blocks than usual it stayed above 4)
Nobody would attack a coin by mining on the right chain, if they wanted to they would have produced the blocks in secret!
Trivia thing:
The total BCH reward is around 1 million a day, so exactly how much BTC miners get only from fees!

Connect the dots!