[kbeaudet]

The only time you would 'dominate' by forcing him to lie over is when you calmly go to remove the aggressor from the siutaion and he turns on you. At that time you must be ready to protect yourself using this technique. Always protect the weaker dog.
As mentioned in most of the comments posted here- keep them seperate but where they can see each other so you don't inadvertantly cause another problem.
That being said, WALK, WALK, WALK them together. As commented on, a lo-o-ong walk will do wonders to lower their energy level and they will find their own place all while enjoying being together and more importantly, together 'with you'.
Time- Patience- and Calm will prevail.
"Followers need a true leader with a commanding 'presence'. So it is for your dog"