"The enemy is out there," I said, pointing out the window to the world beyond. "The enemy is all other competing companies in your industry that are vying for your customers. The enemy is not in here, inside the walls of this corporation. The departments within and the subsidiary companies that all fall under the same leadership structure -- you are all on the same team. You have to overcome the 'us versus them' mentality and work together, mutually supporting one another."

"...It's about the bigger, strategic mission

From Chapter 5: Extreme Ownership by Jocko Willink and Leif Babin