C691 The Anti-terrorist Elite Is also Real and Fake

Red and blue combat drills were a common exercise conducted by large military sectors. It was a special type of drills. It was very simple, but it was a competition of strength. It's sometimes called a counter-terrorism exercise.

For one side to attack and one side to defend, it could also be to set a goal and then let the two sides achieve it. Whoever reaches that goal first would win