Any experienced army leader knows that, between battles in a big war, there is benefit for the cause to have the troops in confusion, give them conflicting information, etc. This will ensure that:

1. They are on their edge, and not comfortably confident

2. They will be actively sharp in focus, not in a waiting state

3. If any are leaking to the enemy - the enemy will be confused (here all is leaked)

When it is time to strike, everybody is ready and become unified by the order under which to serve.