"You cannot tell the enemy you're going to leave and expect the enemy to not - and expect to succeed. I mean, that's just a fundamental of warfare"

John McCain's quote is a reminder of the value of method and secrecy in warfare. He is recommending that if you reveal your plans to the enemy, you are most likely to fail. This is because the enemy will be able to expect your moves and prepare accordingly. By keeping your strategies secret, you can maintain the component of surprise and increase your chances of success. This quote likewise highlights the value of having a well-thought-out method. If you have a clear plan of action, you can be more positive in your capability to prosper. Eventually, John McCain's quote is a tip that in order to be successful in warfare, you must be tactical and keep your plans concealed from the opponent.