On the Suits finale, the war for the firm was on. Jessica on one side with Edward's support for their firms to merge and Harvey on the other side. Bets were placed that would guaranteed that there would be no winners.
"War" was practically mutually assured destruction. Even though no one died, relationships were destroyed that will be difficult to repair. Harvey brought lawsuits against Edward's clients and the first attack was launched.
If Harvey won, then Edward would go away and the merger would be off. If Harvey lost, he would work for the newly merged firm with an extended non-compete contract, all without his name on the door. Ouch.